Is this right? Trying to get all my work done please hurry!!

Point a is located at (0, 4), and point c is located at (−3, 5). find the x value for the point b that is located one fourth the distance from point a to point c. −0.25 −0.5 −0.75 −1

Solve the equation w^3 = 1,000 i honestly dont know how to punch this into a calculator pls

If i purchase a product for $79.99 and two accessories for 9.99 and 7.00 how much will i owe after taxes applies 8.75%