A parabolic arch spans a stream 180 feet wide. How high above the stream must the arch be to give a minimum clearance of 20 feet over a channel in the center that is 140 feet wide?
A. 20 feet
B. 27.475 feet
C. 50.625 feet
D. 70.625 feet
E. 31.925 feet
Answer: C
Mathematics
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Solve the equation.
= 4
A. ? B. {6, -6} C. {5, -5} D. {5}
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Solve. Write a mixed numeral for the answer.A laminated lab bench has 1
inches of plywood, 2
inches of pressed board, and 
inch of formica. What is the thickness of the lab bench?
A. 4
in.
B. 1
in.
C. 
in.
D. 
in.
Mathematics
Solve the problem.One-half serving of soy sauce contains 323 milligrams of sodium. How many grams of sodium from soy sauce are included in an egg-foo-young dish made from 2 servings of soy sauce? Round to the nearest tenth of a gram.
A. 1.3 g B. 0.2 g C. 64.6 g D. 161.5 g
Mathematics
Use the imaginary unit to write the expression.- 
A. 2
B. -2
C. -2i
D. 2i
Mathematics