Find the sum of the first 90 terms of the sequence –4, –1, 2, 5, 8, a. 11654 c. 11656 b. 11657 d. 11655

D. 11655

Step-by-step explanation:

Given sequence : –4, –1, 2, 5, 8, ...

here, the first term = -4

Common difference =

By Arithmetic progression, the sum of n terms will be

Then,  the sum of first 90 terms will be

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: