word problem help

Question

Use the formula interest i=prt to find the missing value 

 

I=$216.00,P=$2200.00,R=?,T=3yr

Answer 1

Rearrange the formula

 

So i=prt becomes r=i/pt

 

Then plug in the values.

 

So r=$216/($2200×3)

 

So r=.0327