12 people fit comfortably in a 4 feet by 6 feet area. use this value to estimate the side of a crowd that is 15 feet deep on one side of the street along a 4 mile section of a parade route

Abcd is a parallelogram. the diagram is not drawn to scale. if m

52 cm radius = diameter = area = circumference = circumfer

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?