Please answer as fast as possible!! Nora drew a non-square rectangle. Then she drew the length of each side from end to end to make a line segment that represents the perimeter.
A)Write an equation that represents the perimeter of the model shown.
B)Rearrange the order of the sides so you can represent the perimeter with a different equation. Is this equation equivalent to your first equation?
C)How many different ways can you express the relationship in A and B? Are any of them more useful than the others?

Fast! find the length of cu. the triangles are similar. show your work.

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?

The perimeter of a quarter circle is 14.28 miles. what is the quarter circle's radius?