If y = 2x + 7 were changed to y = 12x + 7, how would the graph of the new function compare with the original?

a. it would change orientation and slant up.
b. it would be less steep.
c. it would be steeper.
d. it would change orientation and slant down.

What is the value of the product (3-2i)(3+2i)?

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?

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)