Determine the amount of money that should be invested at a rate of 8% compounded quarterly to produce a final balance of $20000 after 10 years

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 P

if x decreases by 4 then y increases by 10

step-by-step explanation: