A pizzeria plans to sell three sizes of its new pizza with cheese in the crust. A small pizza will be 8 inches in diameter, a medium will be 12 inches in diameter, and a large will be 16 inches in diameter.

The owner had to figure out prices for their pizzas, using the area of the base of the pizza as a guide.

She conducted a survey of customers and found that $6 would be a fair price to sell the small pizzas for.

A Show your work in the space below to find the area of each pizza. Use 3.14 for pi. Use the area of a circle formula

Please help I know nothing about circles!

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?