In the isosceles △ABC, points D and F are on leg CB while point E is on leg AB so that AC = AD = DE = EF = BF. Find the measures of the angles of △ABC. Find measure of angle A, measure of angle B, and measure of angle C

30 years

Step-by-step explanation:

On your ninth birthday, you received $300 which you invested at 4.5 percent interest, compounded annually.

Principal amount is $300

rate of interest is 4.5%

your investment is now worth $756. So amount after t year is $756

We use compound interest formula

A is the final amount

P is principal amount

r is the rate of interest 0.045

t is the number of years

Plug in the values in the formula

Divide both sides by 300

Take ln on both sides

Divide both sides by ln(0.045)

t= 20.99= 21 years

9 years + 21 years = 30 years

She is 30 years old now