Find the number of terms, n, in the arithmetic series whose first term is 13, the common difference is 7, and the sum is 2613. A26
B27
C23
D32

n=26

Step-by-step explanation:

Sum=(n/2)*(2a+(n-1)d)

2613=(n/2)*(26+(n-1)7)

5226=26n+n(n-1)*7

5226=19n+7n^2

n=26 or -201/7, but n is a natural number so, n=26

d) 48

step-by-step explanation:

16,32,48,64,80,96,112,128,144,160,176,192,208,224,240,256,272,288,304,320,336

we'll this would mean that the dunk tank and the bounce house are the same for 20 hours because the 2 represents that the two activities, and the 20 represents the amount of hours they both are. so with this said, it means that the answer is c. the costs for a dunk tank and bounce house are the same for 20 hours.

c.the costs for a dunk tank and bounce house are the same for 20 hours.

hope this .