Find the final amount in the following retirement account, in which the rate of return on the account and the regular contribution change over time.
$373 per month invested at 4%, compounded monthly, for 5 years; then $707 per month invested at 5%,
compounded monthly, for 5 years.
What is the amount in the account after 10 years?

step-by-step explanation:

abc

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

6.25 grams

step-by-step explanation: