Suppose Skyler invests in an annuity that pays 3.2% annual interest, compounded monthly. If she contributes $155 every month for 10 years, how much interest would she earn during that time

$3,286.47

Explanation:

Find the future value of the annuity after 10 years.

Number of periods = 10 * 12 months = 120 months

Interest = 3.2% / 12 = 3.2/12%

Future value of annuity = Annuity * ( (1 + rate)^ number of periods- 1) / rate

= 155 * ( ( 1 + 3.2%/12) ¹²⁰- 1) / 3.2%/12

= $21,886.47

The find the amount that the money would have come to without being invested:

= 155 * 120 months

= $18,600

Interest is:

= 21,886.47 - 18,600

= $3,286.47

hi : ) i found this so i hope this !

"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"