I WILL GIVE BRAINLIEST SOLVE THESE PROBLEMS. 1) A store has hats for $9 each on a square table. The table is covered in hats and each hat uses 1 square foot of space. If the table is 5 feet square, how much would all the hats on the table cost?

2) A cube shaped tank has edged lengths of 1/2 foot. Sheldon used the expression s^3 = V to find the volume, What was the volume of the tank in cubic feet?

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?