If a scientist has 4x 10^7 cells in a growing culture, and introduces 4 x 10^9 more to the culture, then how many cells does the scientist have altogether? Your answer should be in scientific notation.
a. 404 x 10^7
b. 8 x 10^16
c. 4.04 x 10^9
d. 1.6 x 10^17

On a cm grid, point p has coordinates (3,-1) and point q has coordinates (-5,6) calculate the shortest distance between p and q give your answer to 1 decimal place

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?

Simplify. 3(4+4x) (type your answer in with no spaces)