Solve the problem.The equation D = 
n(n - 3) gives the number of diagonals D for a polygon with n sides. Use this equation to solve the problem. Find the number of sides n for a polygon that has 90 diagonals.
A. 15 sides
B. 3 sides
C. 12 sides
D. 16 sides
Answer: A
Mathematics
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Graph the function.y = -3 cos x 
A. 
B. 
C. 
D. 
Mathematics
Find the tangential and normal components of the acceleration.r(t) = 4(1 + t)3/2i + 4(1 - t)3/2j + 3tk
A. a = 
N
B. a = 3
N
C. a = T + 3
N
D. a = 3
T
Mathematics
Solve the problem.A circular sector has an area of 486 ft2. The radius of the circle is 9 feet. What is the arc length of the sector?
A. 110 ft B. 54 ft C. 12 ft D. 108 ft
Mathematics
Solve the problem. Round money amounts to the nearest cent.A floor tile measures 32 cm by 32 cm and weighs 170 g. How many kilograms would a stack of 29 tiles weigh?
A. 49.3 kg B. 493 kg C. 0.493 kg D. 4.93 kg
Mathematics