Use the formula for the sum of the first n terms of a geometric sequence to solve.Find the sum of the first 13 terms of the geometric sequence: 5, -10, 20, -40, 80, . . . .
A. 13,649
B. 13,655
C. 13,653
D. 13,662
Answer: B
You might also like to view...
Use colored counters to answer the question. Typically, black counters represent a profit or a positive number, while red counters represent a loss or a negative number. Here, use white in place of red, that is, consider a white counter to mean what a red counter would in the typical case.Draw a colored counter diagram with the least number of counters to represent -2.
What will be an ideal response?
Solve the problem.Anne and Nancy use a metal alloy that is 14% copper to make jewelry. How many ounces of an alloy that is 11% copper must be mixed with an alloy that is 16% copper to form 125 ounces of the desired alloy?
A. 50 ounces B. 75 ounces C. 80 ounces D. 52 ounces
Provide an appropriate response.Solve: 
- 1 = 
Fill in the blank(s) with the appropriate word(s).
Use the quadratic function to determine if the function has a maximum or minimum value and then find this maximum or minimum value.f(x) = x2 + 18x + 71
A. maximum at (0, -9) B. minimum at (-9, -10) C. maximum at (-10, -9) D. minimum at (-10, 0)