Evaluate.
A. 44
B. -70
C. 20
D. -44
Answer: A
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Solve the problem.A Ferris wheel has a diameter of 240 feet and the bottom of the Ferris wheel is 8 feet above the ground. Find the equation of the wheel if the origin is placed on the ground directly below the center of the wheel, as illustrated. 
A. x2 + y2 = 14,400 B. x2 + (y - 128)2 = 14,400 C. x2 + (y - 120)2 = 57,600 D. x2 + (y - 120)2 = 14,400
Decide whether the relation defines a function.x = y4
A. Function B. Not a function
Solve.The loudness, D, in decibels of a sound of intensity I is given by D = 10 log (I/I0), where I is measured in watt/m2 and I0 = 10-12 watt/m2. What is the decibel level of a noise whose intensity is 4.87 x 10-5 watt/m2? (Round to the nearest whole number.)
A. 67 decibels B. 77 decibels C. 177 decibels D. 8 decibels
Solve.Susan's back yard is rectangular with dimensions 36 yd. by 73 yd. Carlos's back yard is rectangular with dimensions 30 yd. by 57 yd. How much larger is the area of Susan's back yard than the area of Carlos's back yard?
A. 2628 yd.2 B. 44 yd.2 C. 918 yd.2 D. 4338 yd.2