Solve.A rectangle that is x feet wide is inscribed in a circle of radius 20 feet. Express the area of the rectangle as a function of x. Graph the function and from the graph determine the value of x, to the nearest tenth of a foot, which will maximize the area of the rectangle.
A. 28.7 feet
B. 27.9 feet
C. 28.3 feet
D. 29.1 feet
Answer: C
Mathematics
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Solve the problem. Use 3.14 for ?.The striking circle in field hockey is a semicircle with a radius of 15.6 yd. Find the area of the semicircle.
A. 382.0752 yd2 B. 764.1504 yd2 C. 3056.6016 yd2 D. 97.968 yd2
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Perform the indicated operations and simplify the result. Leave the answer in factored form.
+ 
+ 
A. 
B. 
C. 
D. 
Mathematics
Find the integral.
A. 3x3 + 30x - 
x-1 + C
B. 3x3 + 15x - 
x-1 + C
C. 
x2 + 5 ln 
+ C
D. 
x4 + 25 ln 
+ C
Mathematics
Find the phase shift of the function.y = 2 sin 
A. 
units to the right
B. 2 units down
C. 2 units up
D. 
units to the left
Mathematics