Answer:
r=35ft, d=70ft. when r=15 mm, d=30mm
Step-by-step explanation:
Radius is half of diameter
Ask: When will (4w-5)(7-w) equal zero?
When 4w-5=0 or 7-w=0
Solve each of the 2 equations above
w = 5/4 , 7
Answer:
Step-by-step explanation:

I think you mean:
A parking lot is 100 yards long. What is the length of 3/4 of the parking lot?
3/4 * 100 Mathematical Expression.
3/1 * 25 Simplify.
75 Multiply.
Final Answer: 75 yards long