Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth. A rocket is launched from atop a 99-foot cliff with an initial velocity of 122 ft/s.
a. Substitute the values into the vertical motion formula h = -16t2 + vt + c. Let h = 0.
b. Use the quadratic formula find out how long the rocket will take to hit the ground after it is launched.
Round to the nearest tenth of a second.

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?

Y= a(x-3)squared-1 what is the value of a

Suppose the equation ||x-a|-b|=2008 has 3 distinct real roots and a not =0. find the value of b.