Multiply and simplify.(sin ? - 1)(sin ? + 1)
A. cos2?
B. - cos2?
C. - cos2? - 2 sin ?
D. cos2? - 2 sin ?
Answer: B
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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 Parabolic Rule.
A. 7700 ft3 B. 10,200 ft3 C. 5800 ft3 D. 8700 ft3
Solve.There are currently 54 million cars in a certain country, decreasing by 2.6% annually. How many years will it take for this country to have 25 million cars? Round to the nearest year.
A. 11 years B. 130 years C. 30 years D. 3 years
Simplify the rational expression. Assume that no variable has a value which results in a denominator with a value of zero.
A. 
B. 
C. 
D. 
Divide. Express the quotient in lowest terms.
÷ 
A. 
B. 
C. 
D. 