Solve the problem.Assume that a person's threshold weight W, defined as the weight above which the risk of death rises dramatically, is given by W(h) = 
3, where W is in pounds and h is the person's height in inches. Find the threshold weight for a person who is 6 ft 2 in. tall. Round your answer to the nearest pound.
A. 128.1 lb
B. 221.5 lb
C. 217.8 lb
D. 245.3 lb
Answer: C
Mathematics
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Solve the problem.A searchlight is shaped like a paraboloid of revolution. If the light source is located 2 feet from the base along the axis of symmetry and the opening is 12 feet across, how deep should the searchlight be?
A. 18 ft B. 9 ft C. 0.2 ft D. 4.5 ft
Mathematics
Plot the point whose polar coordinates are given.(-4, ?/2)
A. 
B. 
C. 
D. 
Mathematics
Find a parametric equation for the parabola described.Focus (-8, 10), directrix x = -2
A. x = - 
t2 - 5, y = t + 10
B. y = - 
t2 + 10, x = t - 5
C. x = - 
t2 + 5, y = t - 10
D. x = 
t2 - 5, y = t + 10
Mathematics
Multiply.(7i)(-10i)
A. -17 B. -70 C. 17 D. 70
Mathematics