Serena parachutes from a plane at a height of 20,000 ft. above sea level. several minutes later she notes from an instrument on her wrist that she had dropped 15,000 ft. how far above sea level is she now?
a. 5,000
b. -5,000
c. 10,000
d. -15,000

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

Solve 2^x=32 and rewrite this equation in a logarithmic 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?