Question

I NEED HELP PLEASE!!!!!!!
1) How long is it from 9:15 am to 4:48 pm? h
2) Find the value of 4n if n=7
3) Solve the equation 3y=21
4) Change the index notation of a⁴ to its factors

Answer 1

1) 7 hours and 33 minutes
2) 28
3) y = 7
4) a times a times a times a