The correct answer is C: -3b and 4b.
Answer:
a.

b. 10 
Step-by-step explanation:
= 100 -> so 100*0.005= 5
if you still dont understand search up "scientific notation"
2 groups if 4 bicyclists or 4 groups of 2 bicyclists. Well it's only 1.75 per truck so since there were 4 trucks 4•1.75=7.00 :)