Cynthia invests some money in a bank which pays 5% compound interest per year. she wants it to be worth over £8000 at the end of 3 years. what is the smallest amount, to the nearest pound she can invest

The smallest amount is

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

Round to the nearest pound she can invest

The smallest amount is

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.