Andre wants to make an open box by cutting out corners of a 22 inch by 28 inch poster board and then folding up the sides. the volume v(x) in cubic inches of the open top box is a function of the side length x in inches of the square cutouts. write and expression for v(x)

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

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?