An investment of $8000 grows to $10,292.76 in 4 years. Find the annual rate of return for annual compounding. [Hint: Use P(1 + r/m)^mt with m = 1 and solve for r (rounded to one decimal place).]

Step-by-step explanation:

we know that    

The compound interest formula is equal to  

where  

A is the Final Investment Value  

P is the Principal amount of money to be invested  

r is the rate of interest  in decimal

t is Number of Time Periods  

n is the number of times interest is compounded per year

in this problem we have  

substitute in the formula above

solve for r

Elevated to 1/4 both sides to remove the exponent in the right side

Convert to percentage

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

(0.2)+(-8)=0.3+-3+0.3m is the equation i guess? ?

step-by-step explanation: