How many times greater is 6 x 10^-6 than 3 x 10^-8 I need this right away and I will do whatever just please help

A. 2 times

B. 20 times

C. 200 times

D. 2,000 times

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.