What is the value of r of the geometric series?

Sigma-Summation Underscript n = 1 Overscript 3 EndScripts 1.3 (0.8) Superscript n minus 1

Answers

Answer 1

Answer:

A) 0.8

Step-by-step explanation:

0.8 on edge.

Answer 2

The value of r of the geometric series is 4/5.

What is geometric series?

The geometric series defined as a series represents the sum of the terms in a finite or infinite geometric sequence. The successive terms in this series share a common ratio.

The nth term of a geometric progression is expressed as

Tₙ = arⁿ⁻¹

Where a is the first term, r is the common ratio

Given the formula for the geometric series expressed as

[tex]_3\\\sum{1.3(0.8)^n^-^1}\\n=1[/tex]

Comparing both equations

rⁿ⁻¹  =  (0.8)ⁿ⁻¹

r = 0.8

r = 8/10

r = 4/5

Hence, the common ratio is 4/5.

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Related Questions

what does the denominator of 3/2 mean?

Answers

Hello!

The denominator is like the number under the line. So in this case, 2 would be the denominator.

~Sophia

3
What is the solution to the equation 9x = 54?
x = 6
B) x = 7
C
X = 8
x = 9

Answers

Answer:

6

Step to Step:

9x6=54

Answer:

Option A

Step-by-step explanation:

In order to find the answer to this equation you must remember to divide if there is a variable right next to the number.

[tex]9x=54[/tex]

[tex]\div9[/tex]

[tex]54\div9=6[/tex]

[tex]x=6[/tex]

Hope this helps.

what is the unit rate shown by the graph​

Answers

Answer:

id say 30 kilometers per hour

30 Kilometers per hours

Is a -2/3 a integer?Is it also a rational number?

Answers

No it’s not a rational number

Solve the equation d- 1/4 = 3

Answers

Answer:

d = 13/4

Step-by-step explanation:

Answer:

d= 13/4 or 3.25

plz give brainliest

Step-by-step explanation:

What is the measure of A

Answers

Answer: it is about 80%

Step-by-step explanation:

Answer:

i think about 140 degrees

Step-by-step explanation:

Mia takes a random sample of 10 of her coworkers and asks them each how many pets they have. Assume that
their results are independent, and let X represent the average number of pets in the sample.

Answers

Answer: Each trial isn’t being classified as a success or failure, so X is not a binomial variable.

Step-by-step explanation:

X is not a binomial variable since each trial is not categorized as a success or failure.

What is a binomial variable?

The likelihood of failure increased to the power of the difference between the number of successes and the number of tries is multiplied by the chance of succeeding raised to the power of the number of successes.

The chance of success for the trials in question in a binomial distribution must stay constant. Because there are only two possible outcomes when flipping a coin, the likelihood of doing so is 0.5 for each trial.

Since lX indicates the typical number of pets in the sample and their outcomes are independent, X is not a binomial variable.

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What is 264*675+1239-56+887

Answers

Answer:

180270

Step-by-step explanation:

Do Pemdas to find order of operations:

(264*675)+ 1239-56+887

So it is:

(178200)+2070

This equals: 180,270

Composite figures. PLEASE help me identify the area of the figure. Thank you!

Answers

Answer:

[tex] 84 \: {cm}^{2} [/tex]

Step-by-step explanation:

Area of the figure = Area of rectangle + Area of trapezoid

[tex] = 18 \times 3 + \frac{1}{2} \{(18 - 11) + 3) \}(9 - 3) \\ \\ = 54 + \frac{1}{2} \{7 + 3 \}6\\ \\ = 54 + 10 \times 3\\ \\ = 54 + 30 \\ \\ = 84 \: {cm}^{2} [/tex]

The equation of the line graphed below is

Answers

Answer:

y=1/2*x+1

explanation: The slope is 1/2 by picking any 2 points and doing rise/run. the y-intercept is 1 therefore +1 at the end.

9x^{2} - x^{3} - 9 + x
What is ^^^ factored?

Answers

Step-by-step explanation:

9x² - x³ - 9 + x

factored = x²(9 - x) - (9 - x)

= (9 - x)(x² - 1)

= (9 - x)(x + 1)(x - 1)

What value of x will make the equation below true?
5x=3x+8

Answers

Answer:

x = 4

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

~Hoped this helped~

PLEASEEE HURRY I WILL GIVE BRAINLEST ITS JUST ONE QUESTION

This is literally my last try and if I get this wrong I fail PLEASE answer it correctly that’s all I ask.

(I just need the last question. The multiple choice answers are ‘4,5,6,7,8,9’ I am allowed to choose more than one if needed)

Below is the graph of a polynomial function F with real coefficients. Use the graph to answer the following questions about F. All local extrema of F are shown in the graph.

Answers

Answer:

A. The first one is a check the second one is a check the third one is a check  and the 6th one is a check.

B. I think it is -5. 3, 8

C. should be negative  

D. I think im sure but i dont want to give you the wrong answer

Step-by-step explanation:

Good luck on your test!

some plz help because the teacher says that I have to do it by my self I need help

Answers

Answer: I think the red moon is equal to 64 because 64 is half of 128, and I think the purple square is equal to 12 because if you add all of the other shapes, they equal 52 and 64 - 52 is 12.

Which step should be performed first when simplifying 25−(14−8)+3×2 ?

Answers

Step-by-step explanation:

the operation of addition first, then multiplication; whereas student 2 ... When performing arithmetic operations there can be only one correct answer

Simplify and write the trigonometric expression in terms of sine and cosine: sec t − cos t sec t = ( f ( t ) ) 2 sect-costsect=(f(t))2

Answers

Answer:

[tex]f(t) = 1 - cos^2\ t[/tex] and [tex]f(t) = sin^2\ t[/tex]

Step-by-step explanation:

Given

[tex]\frac{sec\ t - cos\ t}{sec\ t} = f(t)[/tex]

Required

Simplify

[tex]f(t) = \frac{sec\ t - cos\ t}{sec\ t}[/tex]

Split fraction

[tex]f(t) = \frac{sec\ t }{sec\ t} - \frac{cos\ t}{sec\ t}[/tex]

[tex]f(t) = 1 - \frac{cos\ t}{sec\ t}[/tex]

[tex]sec\ t = \frac{1}{cos\ t}[/tex]

So, we have:

[tex]f(t) = 1 - \frac{cos\ t}{\frac{1}{cos\ t}}[/tex]

[tex]f(t) = 1 - cos\ t * cos\ t[/tex]

[tex]f(t) = 1 - cos^2\ t[/tex]

In trigonometry:

[tex]1 - cos^2\ t = sin^2\ t[/tex]

So, we have:

[tex]f(t) = sin^2\ t[/tex]

HELP BRIANLIEST TO BEST ANSWER
The school store has 1200 pencils in stock and sells an average of 25 pencils per day. The manager reorders when the the number of pencils in stock is 650.


The number of days is the independent variable.

True or false

Answers

Answer:

If anything, I think the answer is true. That is about 30 days, and that is an independent variable to me.

Step-by-step explanation:

Answer:

false they are measuring the amount the sold

During a test drive, a self-driving car travels a distance of 50 miles in 80 minutes. How many miles will the car travel after 160 minutes?

Answers

Answer:

100

Step-by-step explanation:

80*2=160

so 50*2=100

Pls help extra points and mark brainlist

Answers

Answer:

80 +30h

Step-by-step explanation:

Answer:

80 + 30h

Step-by-step explanation:

Distribute the 10 over the (8 + 3h). This means: multiply 10 by 8 and by 3h.

10 x 8 = 80

10 x 3h = 30h

10(8 + 3h) = 80 + 30h

then we can walk 1/3 miles in 5 minutes if Tammy walks a constant Pace how far does he walk in 1 minute ​

Answers

0.06(repeating)miles

What is 7÷854 can you answer this question it is hard.

Answers

Answer:

0.00819672131 or 8.19x10^-3

just put it in a calculator

Answer:

Hey! so the answer is 0.00819672

Step-by-step explanation:

Just simply divide

Hoped this helped! Have a great day! Im Eve btw. Also consider marking this brainliest. Thank you in advanced if you do!✨

Find the value of X

Answers

Answer:

18

Step-by-step explanation:

This is a 5 sided shape, aka a pentagon, and we know that five sided shape's angles add up to 540, so our equation is:

(9x-6)+(3x+23)+95+(7x-4)+90=540.

Combine like terms:

We get 25x+90=540

x = 18

Find the circumference of 17 km

Answers

Answer:

23

Step-by-step explanation:

Area = π·r2 = 3.14·2.712 = 23 square kilometers(*)

02.CI.Pre-
What is the approximate distance between point L (3,5) and point M (9,- 7)?
6.3 units
13.4 units
18.0 units
90.0 units

Answers

13.4 units hope this was helpful

The distance between two given coordinate points is 13.4 units. Therefore, option B is the correct answer.

What is distance formula?

The distance formula which is used to find the distance between two points in a two-dimensional plane is also known as the Euclidean distance formula. On 2D plane the distance between two points (x₁, y₁) and (x₂, y₂) is Distance = √[(x₂-x₁)²+(y₂-y₁)²].

The given coordinate points are L (3, 5) and M (9, -7).

Substitute, (x₁, y₁)=(3, 5) and (x₂, y₂)=(9, -7) in distance formula, we get

LM=√(9-3)²+(-7-5)²

= √36+144

= √180

= 13.4 units

Therefore, option B is the correct answer.

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(GIVING BRAINLIYEST)
7. what is the volume of these 2 objects

Answers

3. 140 m^3
(3 x 6 x 7) + (1 x 2 x 7) = 126 + 14 = 140

4. 216 in^3
(4 x 4 x 9) + (3 x 4 x 6) = 144 + 72 = 216

figure #1

smaller part

4x7x2= 56m

larger part

4x3x7= 84m

84+56= 140m³

figure #2

smaller part

2x4x3= 24m

larger part

4x4x12= 192m

192+24= 216in³

Make a visual model to show the number pattern for 5, 10, 15, 20, 25?

Answers

Answer:

It would be like counting up fives

Step-by-step explanation:

Answer:

It would be going up by 5 every time.

brainliest pls

Step-by-step explanation:

The ratio of red to blue marbles is 4 to 5. If there are 36 marbles
how many are blue?

Answers

Answer:

There are 45 blue marbles

Step-by-step explanation:

Well if 4 times 9 is 36, then 5 times 9 is 45

= 36 : 45

When Brandon went bowling, it cost $4.95 per game, plus a one-time fee to rent the shoes. Brandon played 5 games and paid $32. Write and solve a linear equation to find the cost to rent the shoes. Enter just the equation in slope-intercept form on this question.


Use the equation from the previous question to find the cost of renting the shoes.​

Answers

Answer:

$7.25.

Step-by-step explanation:

Given that, when Brandon went bowling, it cost $ 4.95 per game, plus a one-time fee to rent the shoes, and knowing that Brandon played 5 games and paid $ 32, to find the cost to rent the shoes the following equation must be performed :

4.95 x 5 + X = 32

24.75 + X = 32

X = 32 - 24.75

X = 7.25

Thus, the cost of renting the shoes was $ 7.25.

Abu solved 231 multiplication problems. Later, he also solved 131 divison problems. How many more multiplication problems than divison problems did Abu solve?

Answers

Answer:

Easy! Abu solved 100 multiplication problems more than division problems

Step-by-step explanation: Just take 231 - 131 = 100 :D

WILL GIVE BRAINLIEST, 100 POINTS
The diagram shows a 6 ft student standing near a tree. The shadow of the student and the shadow of the tree end at point A. What is the height of the tree?

Question 1 options:

90 ft^2

90 ft

18 ft

18 ft^2

Answers

Answer:

18ft

Step-by-step explanation:

:p

The height of the tree is 14 feet.

What is Proportion?

In general, the term "proportion" refers to a part, share, or amount that is compared to a total.

According to the concept of proportion, two ratios are in proportion when they are equal.

According to proportion, two sets of provided numbers are said to be directly proportional to one another if they increase or decrease in the same ratio. "::" or "=" are symbols used to indicate proportions.

Given:

Height of Man= 6 feet

Shadow height= 5 feet

and, Height of tree shadow= 15 feet

So, using Proportion

FE/ BC = FA/ AC

6 / x = 5 / 15

5x= 90

x= 14 feet

Hence, the tree is 14 feet tall.

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