Answer:
The first choice
Step-by-step explanation:
h=-3
hope it helps
The formula for the area of a triangle is area=

. So when you plug in the given values: Area=

. When you convert all the numbers to fractions: Area=

. You multiply across the numerators and divide by the product of the denominators and get 137.25

.
Answer:
Hours
Step-by-step explanation:
21a. One week is too long so using hours will help, but when doing a quick thing you can use seconds.
21b. (Sorry I can't see the question, so I can't answer that part.)
:)
Answer:
1,846.30
Step-by-step explanation: