How to simplify -1.5 times -2

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

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

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?