Question 293726
First you need to know the continuous compounding formula and it is A=Pe^rt

A=ammount  
p=principle
e=continuous button on calculator
r=rate
t=time


then plug in what you know

A=7000e^(.08)(2)


then plug into a calculator and make sure to use enough parenthesis

A=(7000e^(.08)(2))

the final answer should be

$15166.02


the next part of the problem is asking for time so you put in what you got for A and use the new information

15166.02=400e^(.03)(t)

first devide both sides by 400

37.91505=e^.03t

37.91505=1.03045t

t=36.8 years