Answer:
1758 years
Step-by-step explanation:
0.693/t1/2 = 2.303/t log No/N
t1/2 = half life of the C-14
t= time taken
No= amount of radioactive material originally present
N= amount of isotope after time t.
But N= 0.81 No
0.693/5715= 2.303/t log No/0.81No
0.00012 = 0.211/t
t =0.211 /0.00012
t= 1758 years
←
Find the area of the shaded region shown to the right.
The area of the shaded region is
in.².
4 in.
2 in.
3 in.
11 in.
.5(4*11) - .5(2*3)
22- 3= 19
i didn't get any of the answers you put i got 19
a pyramid is made of metal balls. the lowest layer consists of 4 by 4 balls ,the next layers of 3 by 3 and 2 by 2 and one ball at the top. every two balls that touch each other are connected with screw. how many screws are used to build this pyramid?
Answer:
total answer is a 34.
Step-by-step explanation:
4444
4444
4444
4444=18
333
333
333=12
22
22=4
Total is 34.
Answer:
answer is 96
Step-by-step explanation:
MARK ME AS THE BRAINLIEST
the ratio of two numbers is 7:3 and their sum is 50,find the two numbers
Please show explanation
Answer:
35 and 15
Step-by-step explanation:
7+3=10
50÷10=5 so you multiply each number by five
7×5=35
and
3×5=15
Step-by-step explanation:
let the number be 7x &3x
now,
7x+3x= 50
10x=50
x=50
10
x=5
again,
7x=7×5 = 35
3x= 3×5 =15
therefore the two number are 35 & 15.
hope it helps.
NEED HELP ASAP
WILL GIVE BRAINLIEST
(DO NOT JUST TAKE POINTS OR I WILL REPORT YOU!!)
Matt owes his sister $300. He mows lawn’s after school and on the weekends. He charges $30 a lawn, but pays his friend Steven $10 to help. Matt plans to repair his sister with half of what he earns on each lawn mowed. Which statements are correct?
A) Matt has to mow 15 lawns to pay back $100 to his sister
B) The explicit expression for the situation is 300+10x
C) Matt will have to mow 30 lawns to pay $300 back to his sister
D) Matt reduces his debt to his sister by $10 each lawn he mows
E) This situation can be expressed recursively as Sn=Sn-1-10,S0=300
Answer:
it is c and d
Step-by-step explanation:
if he pays his friend 10 out of the 30 he has 20 left, then he repays his sister half of what get gets from each lawn, therfore he gives her 10 each lawn, the rest is self explanitory
Which linear function has the same y-intercept as the one that is represented by the graph?
Oy=2x-4
Oy=2x-3.
Oy=2x+3
Oy=2x+4
Answer:
Oy=2x+3
Step-by-step explanation:
The function that has the {y} - intercept as that of the function graphed is y = 2x + 3
What is function?A function is a relation between a dependent and independent variable. We can write the examples of functions as -
y = f(x) = ax + b
y = f(x, y, z) = ax + by + cz
Given is to find the linear function that has the same y-intercept as the one that is represented by the graph.
The function graphed has the {y} - intercept of 3.
For the functions given -
Functions {y} - intercept
y=2x-4 -4
y=2x-3. -3
y=2x+3 3
y=2x+4 4
So, the function that has the {y} - intercept of 3 is y = 2x + 3.
Therefore, the function that has the {y} - intercept as that of the function graphed is y = 2x + 3.
To solve more questions on functions, visit the link below-
brainly.com/question/30194223
#SPJ7
guys i need help asap someone good with geomtry???
Answer:
[tex]CF<BC<BF[/tex]
Step-by-step explanation:
[tex]As\ we\ know\ that,\\The\ longest\ side\ in\ a\ triangle\ is\ the\ side\ opposite\ to\ the\ largest\ angle.\\Here\ in\ \triangle BCF,\\\angle B=52\\\angle C=65\\\angle F=63 [Angle\ Sum\ Property\ Of\ A\ Triangle]\\Hence,\\As\ we\ can\ observe\ that\ \angle C\ is\ the\ largest\ followed\ be\ \angle\ F\ and\ \angle B. \\BF\ is\ the\ longest side\ followed\ by\ BC\ and\ CF.\\Hence, \\BF>BC>CF\\Or,\\CF<BC<BF[/tex]
Simplify this expression: -5(c-3d + 1)
Answer:
-5c + 15d - 5
Step-by-step explanation:
1. Distribute the -5 from outside the paranthesis to the inside.
2. Keep in mind the negative signs when you're distributing.
Answer:
-5c + 15d - 5
Step-by-step explanation:
= (-5)(c + -3d + 1)
= (-5)(c) + (-5)(-3d) + (-5)(1)
= -5c + 15d - 5
You have 72 grams of a radioactive kind of actinium. If its half-life is 6 hours, how much will
be left after 12 hours
Answer:
There will be 18 grams left after 12 hours.
Step-by-step explanation:
Half-life is the amount of time it take for a cell to turn from one condition to another.
To find the amount of grams for the first 6 hours.
72 ÷ 2= 36
Now, since 6 x 2 = 12, we need to divide 36 by 2 to find the next half-life.
36 ÷ 2 = 18
Therefore, there will be 18 grams left after 12 hours.
Hope this helps! :D
Evaluate the following expression 1/10^o
Answer:
1
Step-by-step explanation: anything raised to zero is one
Answer:
1
Step-by-step explanation:
anything to the power of zero is equal to 1
Hope this helps! :3
plz mark as brainliest!
the diagram below shows the angles formed by some intersecting lines. give that m<8=34, m<9=40, and mm<3=62, find the measure of <4.
Answer:
m<4 = 44°
Step-by-step explanation:
m<8 = 34°
m<9 = 40°
m<3 = 62°
m<2 = 34° + 40° (exterior angle theorem of a triangle)
m<2 = 74°
m<3 + m<4 + m<2 = 180° (sum of ∆)
62° + m<4 + 74° = 180° (substitution)
m<4 + 136° = 180°
m<4 = 180 - 136 (substitution property of equality)
m<4 = 44°
Points C and D are on a number line (not shown).
The coordinate of point C is -16 and the coordi-
nate of point D is 14. Point E is a point on line
segment CD. If the distance from point E to point
C is 1/4 the distance from point E to point D, what is
the coordinate of point E?
=============================================================
Explanation:
I recommend drawing out the number line. Plot -16 and 14 on it.
Either count out the spaces, or subtract and apply absolute value, to find the distance from -16 to 14 is exactly 30 spaces.
----------
Or you can think of it like this:
From -16 to 0 is 16 spaces
From 0 to 14 is another 14 spaces
That's 16+14 = 30 spaces total.
----------
In short, segment CD is 30 units long.
Point E is somewhere on segment CD.
x = distance from E to C
y = distance from E to D
x+y = EC+ED = CD = 30
x+y = 30
y = 30-x
We're told the distance from E to C is 1/4 the distance from E to D, so,
x = (1/4)*y
x = (1/4)*(30-x)
x = 0.25*(30-x)
x = 7.5 - 0.25x
x+0.25x = 7.5
1.25x = 7.5
x = (7.5)/(1.25)
x = 6
The distance from E to C is 6 units.
This means we'll add 6 units to the location of point C to find out where to place E
E = C+6 = -16+6 = -10 is the final answer
HAVE PICTURE PLEASE HELP!
The answer would be only A
Answer:
only A,good luck on your assignment
Using the distributive property, Marta multiplied the binomial (2x + 3) by the trinomial (×2 + x-2) and got the
expression below.
(2x) (x2) + (2x)(x) + (2x)(-2) + (3)(x2) + (3)(x) + (3)(-2)
Which is the simplified product?
2x³ + 5x² - x - 6 is the simplified product of (2x) (x2) + (2x)(x) + (2x)(-2) + (3)(x2) + (3)(x) + (3)(-2).
What is a trinomial?A three-term algebraic expression is referred to as a trinomial. Variables and constants of one or more terms make up an algebraic expression. These expressions separate words or phrases using symbols or operations like +, -,×, and ÷.
This algebraic phrase includes a trinomial as well as a monomial, binomial, and polynomial. Let's learn more about trinomials, how to factor them, and the formula for doing so while also solving some problems.
It is expressed as
x² + xz + 1
A simplified product will be an equation where we will take all the same variables as common variables.
⇒ (2x)(x²) + (2x)(x) + (2x)(-2) + (3)(x²) + (3)(x) + (3)(-2)
⇒ 2x³ + 2x² -4x +3x² + 3x -6
⇒ 2x³ + 5x² - x - 6
Learn more about trinomials
https://brainly.com/question/12955265
#SPJ9
Question 1 Imaginary & Complex Numbers-Addition & Subtraction Solve the following: (7 – 21) – (2+61) = O 9 +82 O 5 - 42 0 5 - 82 0 5+ 8i
Answer:this did not work for me
Step-by-step explanation:
Point slope form.
Y-4=
In the figure below, points L, J, M, N, and P lle in plane Z.
Points H and K do not lie in plane Z.
For each part below, fill in the blanks to write a true statement.
H
Check
1717
i
K
(a) Another name for plane Z is plane.
(b) and M are distinct points that are collinear.
(c) N,,, and are distinct points that are coplanar.
(d) Suppose line HL is drawn on the figure.
Then HL and are distinct lines that intersect
a) Another name for plane Z is LN plane.
b) PHJ and M are distinct points that are collinear.
c) N and K are distinct points that are coplanar.
d) HL and HK are distinct lines that intersect
a) The common point in lines LN and PN is N and it is the intersection point.
b) Any three non-collinear locations inside a plane can be used to give it a name. Points H, J, and K cannot be combined because an unlimited number of planes cross through them. Think about the flat piece of paper rotating about this axis (like a propeller). We can only build one specific plane if the points are not all along the same line.
I'll choose P, H, and J as the non-collinear points to give the object the name Plane PHJ. There may be other solutions.
c) Because they are on the same line, points H, J, and K are collinear. Fill up the answer box by selecting either H or K. I'll choose point K.
d) Line HK and point P are parallel. Both of them are present on the same flat piece of paper or on the same flat plane.
That flat plane can be compared to the surface of the earth, but point N is located underneath. Therefore, the ground plane and point N wouldn't be coplanar.
Learn more about colinear lines here:
https://brainly.com/question/26224355
#SPJ1
(PLS I NEED IT TODAY)
A cash register contains coins. • 10 pennies • 11 nickels • 13 dimes • 6 quarters A cashier will randomly choose two coins one at a time without replacement. What is the probability that the cashier will choose a penny first, followed by a dime?
F 13/160
G 1/12
H 13/245
J 7/12
♡ Answer ♡
G) 1/12
♡ Step-by-step explanation ♡
In order to figure out this problem, we have to take a few relatively simple steps.
First, we must count the total number of coins in the cash register. Do not change the value of these coins. Simply take the numbers listed in the problem and add them up. Your process for completing this step should look something like this: 10+11+13+6 equals 40. With this being said, there are 40 coins in the cash register.
Next, we must remember the values of the two coins the question is asking for: pennies and dimes. Keep in mind that, out of all 40 coins, 10 of them are pennies and 13 of them are dimes.
Then, we write the fractions used to find the answer to this problem. In the question, the cashier (hypothetically) draws a penny first, and then a dime. This means a penny is drawn before a dime is drawn. (Although it seems like a miniscule detail, this knowledge is actually something extremely important to remember. This small piece of information can actually change the entire answer if not used properly.)
In this problem, the cashier would choose a single penny out of the 10 in contrast to the total 40 coins. Since there are 10 pennies overall, and 40 coins overall, the probability of choosing a penny first is 10/40.
After we complete the probability of choosing a penny before all else, we must find the probability of choosing a dime after choosing a penny. Since the dime will be chosen after the penny is chosen, one coin will be gone: the chosen penny. So, the total amount of coins within the cash register changes (or more specifically decreases (by 1)) from 40 to 39. However, the amount of dimes, 13, stays the same. With this information in mind, we can write a fraction of 13/39 for the probability of choosing a dime after choosing a penny.
Finally, now that we have both probability fractions, we can figure out the answer to the question. In order to do this, we multiply and simplify both fractions. 10/40*13/39 is 130/1560. 130 ÷ 130 is 1. 1560 ÷ 130 is 12. 1 ÷ 12 can also be written as 1/12. Therefore, the answer to this problem is G) 1/12.
(The paragraph and author's note below are technically optional thought processes and information, but read them if you wish. Although I would recommend reading further, considering another way to solve the question is mentioned, it is entirely you (the reader's) choice.)
You can also check this answer through the other/alternate way of solving this problem: by simplifying both probability fractions before you multiply them. 10/40 can be simplified to 1/4. 13/39 can be simplified to 1/3. After doing this, we multiply both simplified probability fractions in order to find, or in this case check, the answer. 1/4*1/3 is 1/12. 1/12 is the same fraction as the one present in choice G. This is the same answer as the one we previously got. This enforces the idea that G) 1/12 is indeed the answer to this question.
A/N (Author's Note): Although it took quite a while to jot down, this was truly a blast to write and explain! I hope this helped those that needed/wanted it. Have a wonderful week reader(s)!
i need help with some questions
Answer:
I will try doing it
Step-by-step explanation:
which are the questions
A crew of highway workers paved 12 mile in 14 hour. If they work at the same rate, how much will they pave in one hour?
Answer:
0.857 miles in 1 hour
Step-by-step explanation:
It is given that,
A crew of highway workers paved 12 mile in 14 hour.
We need to find how much will they pave in 1 hour if they work at the same rate.
14 hours = 12 miles
To find how much they pave in 1 hour, we must divide 12 by 14 as follows :
[tex]1\ \text{hour}=\dfrac{12}{14}\ \text{miles}\\\\=0.857\ \text{miles}[/tex]
Hence, they pave 0.857 miles in 1 hour.0.857 miles in 1 hour.
IN HURRY PLEASE HELP IF CAN
According to the graph, what is the experimental probability of selecting the letter C?
16%
20%
16.7%
24%
Answer: 24%
Step-by-step explanation:
45 is the total number of occurrences, and 6 different occurrences round it off to 8 being the closest to 25% thus that's how I figured out 24
5.) Which situation can be represented by the equation y = 74x? A A company uses a total of y gallons of water at a rate of 74 gallons per hour for x hours. B A restaurant serves a total of y meals in one day, in which 74 meals are served during the first hour and x meals are served during the remaining hours. C A company manufactures a total of 74 drinking glasses every hour, with x of the glasses made of clear glass and y of them made of blue glass. D A restaurant prepares a total of y batches of pizza sauce from 74 pounds of tomatoes, with each batch weighing x pounds.
plsss help i neeeeed it plssssss
Answer:A
Step-by-step explanation:
Joyce saved $130 on an item that was 25
%
off. What was the original price?
Answer:
$520
Step-by-step explanation:
If it was 25% off and she saved 130
then 130 is the 25%
130*4 = 520
8
Find the slope of the line that passes through the points (10,8) and (6, 14).
Write your answer as a simplified fraction.
7x - 2
PLEASE HELP I NEED ANSWERS NOW
Answer:
I'm pretty sure it's already simplified.
Step-by-step explanation:
there is no equal sign or x=
Convert 77 centimeters into feet. Hint: 1 in = 2.54 cm; 1 ft = 12 in
Answer:
77 centimeters = 2.52625 feet
Step-by-step explanation:
Hope this helps! :3
plz mark as brainliest!
Please dont steal I just need a bit of help here I would really appreciate it I will give brainless
Answer:
7.25Step-by-step explanation:
I gave you the answer earlier too!
for more info !
there s a theorem called MIDPOINT THEOREMWhich means the 3rd side of the triangle is equal to 1/2 of the line drawn by joining the mid points
so AB=1/2of YZwhich means
2x-4 = 1/2×21
thus, 2(2x-4) =21
=> 4x-8 = 21
4x = 29
x= 29/4 = 7.25Joan Arlington has twice as much money invested at 5% simple annual interest as she does at 4%. If her yearly income from the two investments is $154, how much does she have at each rate? equation
Answer:
1100
Step-by-step explanation:
Pleaseee help ASAP it’s due in 10 minutes
Answer:
y= 3x + 6
Step-by-step explanation:
y = mx + b
m = slope
b= y intercept
so the equation is y= 3x + 6
Hope this helps, if so please mark brainlist, peace and love
what is 3/5 in %
need answer asap
Answer:
Step-by-step explanation:
3/5 x 100%
60%
Answer:60%
Step-by-step explanation: All percents are out of 100 so do 100 divided by the denominator. 100 divided by 5 is 20 so multiple 3 by 20 and you get 60/100= 60%
William bought 2.35 pounds of apples. Jill bought 0.764 pounds of apples. Frank bought 2.5 times the total amount that William and Jill bought altogether. How many pound of apples did Frank buy?
Answer:
7.785
Step-by-step explanation:
William and Jill together is 3.114 so just times that by 2.5 and your good
Answer:
7.785 lbs
Step-by-step explanation:
add 2.35 and .764 then multiply by 2.5