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
Scorpion4ik [409]
3 years ago
12

What is the sum of the first five terms of a geometric series with a1 = 20 and r = 1/4?

Mathematics
1 answer:
____ [38]3 years ago
4 0
Sum of the first n terms of a geometric sequence is Sn = a(1 - r^n)/(1 - r)
Sn = 20(1 - (1/4)^5)/(1 - 1/4) = 20(1 - 1/1024)/(3/4) = 20(1023/1024)/(3/4) = 26 41/64
You might be interested in
Define a variable, write an inequality, and solve each problem. Check your solution.
grandymaker [24]

Answer:

Step-by-step explanation:

7 0
3 years ago
CAN SOMEONE HELP DO #1 PLEASE
love history [14]

Answer:

  B.  $450

Step-by-step explanation:

The amount of commission is the commission rate (3%) times the amount of sales to which it is applied ($5000). Garrett's commission last week would be ...

  0.03 × $5000 = $150

He is also paid $300 each week in addition to his commission, so his total pay last week was ...

  pay = salary + commission

  pay = $300 +150 = $450

4 0
2 years ago
How much longer is dinner than the slide show?
shutvik [7]

Answer:

35

Step-by-step explanation:

7 0
2 years ago
Find the average rate of change of the function from x=1 to x=2.<br><br><br><br> f(x)=−14/x^2
Irina-Kira [14]

Answer:

The average rate of change of the function from x=1 to x=2 will be: 10.5                

Step-by-step explanation:

Given the function

f\left(x\right)=-\frac{14}{x^2}

at x₁ = 1,

f(x₁) = f(1) =  -14/(1)² = -14/1 = -14

at x₂ = 2,

f(x₂) = f(2) = -14/(2)² = -14/(4) = -3.5

Using the formula to determine the average rate of change at which the total cost increases will be:

Average rate of change = [f(x₂) - f(x₁)] / [ x₂ - x₁]

                                        = [-3.5 - (-14)] / [2 - 1]

                                        = [-3.5 + 14] / [1]

                                        = 10.5 / 1

                                        = 10.5

Therefore, the average rate of change of the function from x=1 to x=2 will be: 10.5                      

6 0
3 years ago
-5(3e - 2) &lt; - 2(6e + 7)
krok68 [10]
This is false, -5(3e-2) is not less than -2(6e+7) 
8 0
3 years ago
Read 2 more answers
Other questions:
  • The salaries of three employees are listed below. Each employee was recently given a raise.
    12·1 answer
  • Find the midpoint of PQ - PLEASE HELP ASAP - IMAGE BELOW
    15·2 answers
  • There was no more rainfall for the rest of the day. Click on the graph until the graph that best represents the given statement
    15·2 answers
  • Evaluate 13 - 0.75w + 8z when w = 12 and x = 1/2
    12·1 answer
  • How many trips can a truck with a 1 by 2 meter cylindrical tank take to fill a 890,000 liters tank?
    10·1 answer
  • A bag contains five red marbles 3 blue marbles and 7 yellow marbles into remodels which radio can be used to compare the yellow
    7·1 answer
  • A flower pot has a radius of 10 inches. Evelyn wants to tie a ribbon around the pot. How long does the ribbon have to be in orde
    9·1 answer
  • Pls help me, I really need help
    15·1 answer
  • List the laws of solid friction​
    7·2 answers
  • Help help math math math
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!