Solve the problem.A window is in the form of a rectangle surmounted by a semicircle. The rectangle is of clear glass, whereas the semicircle is of tinted glass that transmits only one-third as much light per unit area as clear glass does. The total perimeter is fixed. Find the proportions of the window that will admit the most light. Neglect the thickness of the frame.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: C
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If a projectile is fired with an initial speed of  figure 1.png)
ft/s at an angle ? above the horizontal, then its position after t seconds is given by the parametric equations x =( figure 1.png)
cos?)t and y = ( figure 1.png)
sin?)t-16 where x and y are measured in feet.
Suppose a gun fires a bullet into the air with an initial speed of 1024 ft/s at an angle of 30° to the horizontal. After how many seconds will the bullet hit the ground? (a) 36 s (b) 64 s (c) 16 s (e) none of these
Solve the problem.A rectangular swimming pool is being constructed, 18 feet long and 100 feet wide. The depth of the pool is measured at 3-foot intervals across the width of the pool. Estimate the volume of water in the pool using the Trapezoidal Rule.
A. 12,300 ft3 B. 10,500 ft3 C. 9300 ft3 D. 7000 ft3
Find the product.(n + 11)2
A. n2 + 121 B. n + 121 C. 121n2 + 22n + 121 D. n2 + 22n + 121
Solve the problem.A television offer advertised a set of knives for $20 down and $8 a month for 12 months. What is the total cost of the knives?
A. $96 B. $126 C. $116 D. $106