Write (8a^-3)^-2/3 in simplest form. need solving : ) this particular problem confuses me ; -;

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)

If f(x)=3 over x+2 - square root x-3 then f(7)=