Mike's Diner offers its clients a choice of regular and diet soda. Last night, the diner served 3 regular sodas and 12 diet sodas. What percentage of the sodas served were regular?
Write your answer using a percent sign (%).

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Which value is not a solution of 8x^3 – 1 = 0

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?