Find the indicated real roots if n=3 and a=1000

Super ultra mega important if you can answer this correctly i will give you 100 points but if you don't answer it correctly you'll get a big report. so stay aware and have a nice day!

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.

Find the domain and range of the following function f(x) = 51x - 21+ 4