Solve the problem using the quadratic formula.For a car traveling at x mph, stopping distance is estimated by the formula 
Find a (maximum) safe speed for a stopping distance of 690 ft. Round your answer to the nearest mph.
A. 68 mph
B. 64 mph
C. 76 mph
D. 73 mph
Answer: B
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Find the unknown value in the percent proportion 
Round to the nearest tenth, if necessary.part = 14, whole = 56
A. percent = 20% B. percent = 15% C. percent = 30% D. percent = 25%
Simplify.
- 
- 
- 
A. 1
B. 27
C. 
D. 
Solve the problem.The area of a rectangular piece of cardboard shown is 860 square inches. The cardboard is used to make an open box by cutting a 4-inch square from each corner and turning up the sides. If the box is to have a volume of 1680 cubic inches, find the dimensions of the cardboard that must be used.
A. 12 inches by 31 inches B. 20 inches by 43 inches C. 16 inches by 39 inches D. 24 inches by 47 inches
Find area of figure. Round to the nearest hundredth if necessary.Find the area of a rectangle measuring 5.8 yd by 21.41 yd.
A. 33.64 yd2 B. 248.356 yd2 C. 124.178 yd2 D. 27.21 yd2