Classify each polynomial as one of the following:

a) The difference of two squares
b) A perfect square trinomial
C) A frinomial that is not a perfect square.

1. x² - 9
2. x2 + 12x + 36
3. 25x2 - 1
4. x? - 10x + 16
5. x2 - 10x + 25
6. 4x2 +9

Given: △acm, m∠c=90°, cp ⊥ am , ac: cm=3: 4, mp-ap=1. find am.

The value of cos 30° is the same as which of the following?

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?