1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sunny_sXe [5.5K]
2 years ago
11

Which is the sum of the first 6 terms of the geometric series? 7+21 +63

Mathematics
1 answer:
Gwar [14]2 years ago
5 0

Answer:

2,548

Step-by-step explanation:

First, we have to find out the rule. The rule is multiply the previous number by 3 to get the next number.

7x3=21

21x3=63

So, we would continue this pattern until we have the first 6 numbers which are 189, 567, and 1701.

The questions is asking for the SUM of the 6 numbers so you would add the those numbers and do this equation:

7+21+63+189+567+1701= 2548

Hope this helps! :)

You might be interested in
Options:<br> 14<br> 36<br> 16<br> 12
Lerok [7]

Answer:


12 million dollars.


Step-by-step explanation:


Let the sales in the first year be x million .

So the sales in the second year were x + 4 million, in the third year were 3(x + 4) and this is 48 million dollars.

So we have the equation 3(x + 4) = 48

3x + 12 = 48

3x = 36

x = 12 million dollars.

8 0
3 years ago
An automobile manufacturer would like to know what proportion of its customers are not satisfied with the service provided by th
butalik [34]

Answer:

a) A sample size of 5615 is needed.

b) 0.012

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

99.5% confidence level

So \alpha = 0.005, z is the value of Z that has a pvalue of 1 - \frac{0.005}{2} = 0.9975, so Z = 2.81.

(a) Past studies suggest that this proportion will be about 0.2. Find the sample size needed if the margin of the error of the confidence interval is to be about 0.015.

This is n for which M = 0.015.

We have that \pi = 0.2

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.015 = 2.81\sqrt{\frac{0.2*0.8}{n}}

0.015\sqrt{n} = 2.81\sqrt{0.2*0.8}

\sqrt{n} = \frac{2.81\sqrt{0.2*0.8}}{0.015}

(\sqrt{n})^{2} = (\frac{2.81\sqrt{0.2*0.8}}{0.015})^{2}

n = 5615

A sample size of 5615 is needed.

(b) Using the sample size above, when the sample is actually contacted, 12% of the sample say they are not satisfied. What is the margin of the error of the confidence interval?

Now \pi = 0.12, n = 5615.

We have to find M.

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

M = 2.81\sqrt{\frac{0.12*0.88}{5615}}

M = 0.012

7 0
2 years ago
I don’t know what the answer is to this PLEASE HELP !!!
Dafna1 [17]

Answer:

F

Step-by-step explanation:

The solution is containing from - infinity to -1 (it includes -1 can tell by ] )

F has all the solution from - infinity to -1 (including -1, can tell by filled circle on -1)

6 0
3 years ago
The equation of a function is represented by f(x)=(x + 4) ( x - 3). Terri stated that the roots are 4 and -3. Is Terri right or
Alika [10]

Answer:

Terri is wrong the roots are -4 and 3. She mixed up the numbers

Step-by-step explanation:

Hope it helps mark me brainliest

3 0
2 years ago
Maria rented a coat at $285 for 3 days. If she rents the same coat for 6 days, she has to pay a total rent of $510. Write an equ
vekshin1
Y= 75x + 60 will work, good luck
8 0
2 years ago
Other questions:
  • There are 12 small gift bags in each bag came home one toy and some stickers that are 36 stickers is a equal number of stickers
    5·1 answer
  • When all probabilities in a probability model are not the same, it is called a ?
    11·1 answer
  • Cindy measured and recorded the temperature of a liquid for an experiment. She used a poorly calibrated thermometer and noted th
    13·1 answer
  • 2. En el sobre de un jugo instantáneo aparece la siguiente información: “prepare un delicioso litro de jugo de naranja”. Si con
    15·1 answer
  • Solve for x: 2 logz 2x = 6
    13·1 answer
  • If f(x) = (3+x)/ (x-3),what is f(a+ 2)?
    6·1 answer
  • A=20<br> B=10<br> C=23<br> D=29.2
    7·1 answer
  • CAN SOMEONE PLEASE HELP ME!!!
    8·1 answer
  • In the figure below, C is between A and D, and B is the midpoint of AC. If AD=20 and BC=6, find CD.
    5·2 answers
  • If x=3,y=-2(negative 2) and z=6,what is 7xyz
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!