Answer:
2.38 dollars in a week
Step-by-step explanation:
168 hours = Week
400 dollars = Week
400 ÷ 168 = 2.38
1. true
2. false
3. true
4. false
5. true
Here's link to the answer:

Let’s represent his sister’s sales as x
3/4ths of his sister’s sales would be:
3/4x
3 less than 3/4ths of his sister’s sales would be:
3/4x - 3
I'm assuming that the diagonals intersect at E. Since diagonals of a parallelogram bisect each other, BE=ED.
- 7x-2=x²-10
- x²-7x-8=0
- (x-8)(x+1)=0
- x = -1, 8
As distance must be positive, we reject the negative case, so x=8.
Thus, BE=ED=54.