The vertices of rectangle LMNO are shown. L(-7, 6), M(-3, 6), N(-3, 3), 0( – 7, 3)
The rectangle is rotated 90° counterclockwise about the origin.
What are the coordinates of M', the image of point M after the rotation?
A. (3,6)
B. (6, 3)
C. (-3, -6)
D. (-6, -3)

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?