Help give the answers to these!

If f(x) = -5x + 1 and g(x) = x3, what is (gºf)(0)? enter the correct answer

Mallory has been offers two different jobs. she can baby sit for 6 hours a week and get $8.50 an hour. or she can work at the library for 14 hours a week and make $5.50 an hour. which job will allow her to save the most money after 6weeks?

Its urgent! the curved part of this figure is a semicircle. what is the best approximation for the area of this figure? 24+9.125π units² 12+9.125π units² 12+18.25π units² 24+18.25π units²