Solve the problem.The sum of 6 and four times a number is 
. Find the number.
A. 
B. 0
C. 
D. 
Answer: A
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Find the measure of the requested angle.In ?ABC, ?A = 72°, ?B = 54°. Find the measure of ?C.
A. 234° B. 18° C. 54° D. -36°
Solve the problem.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 28 ft and the vertical clearance must be 24 ft at a point 13 ft from the center. Find an equation for the ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve the problem.The quadratic function 
models the median, or average, age, y, at which U.S. men were first married x years after 1900. In which year was this average age at a minimum? (Round to the nearest year.) What was the average age at first marriage for that year? (Round to the nearest tenth.)
A. 1964, 51.2 years old B. 1964, 21.8 years old C. 1953, 36 years old D. 1936, 51.2 years old
Use DeMoivre's Theorem to find the indicated power. Write the answer in rectangular form.(-i)11
A. i B. -1 C. 1 D. -i