Can I get help with number 3 and 4?

tube or goog would be a great resource to with that question

30005

yes ok                                            

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of