Brian works in a lab, and fills an empty cylindrical flask with 200 cubic centimeters of liquid. The flask has a
radius of 3 cm and a height 12 cm. What percent
of the volume of the flask is not filled with liquid?
(Use π=3.14
. Type in your answer rounded to the nearest whole percent.)

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

How do you write y-10=2 (x-8) in standard form

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?