Find the product using one of the formulas for the square of a binomial.(2x + 9)2
A. 4x2 + 36x + 81
B. 2x2 + 36x + 81
C. 4x2 + 81
D. 2x2 + 81
Answer: A
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Solve the problem.What is the range of the cotangent function?
A. all real numbers from -1 to 1, inclusive B. all real numbers greater than or equal to 1 or less than or equal to -1 C. all real numbers, except integral multiples of ?(180)° D. all real numbers
The graph of f(x) = ax2 + bx + c is given in the figure. Determine whether the discriminant is positive, negative, or zero.
A. Negative B. Zero C. Positive
Solve the problem.One method to determine the time since an animal died is to estimate the percentage of 
remaining in its bones. The percent P in decimal form of 
remaining after x years is given by 
Approximate the percentage (to the nearest hundredth) of 
left after 2000 years.
A. 50.00% B. 3.88% C. 25.76% D. 78.51%
Solve the problem. Round to the nearest cent or tenth of a percent.Reduced price = $49.92; markdown rate = 15%. Find the original price and the markdown amount.
A. Original price = $42.43 Markdown amount = $7.49 B. Original price = $41.11 Markdown amount = $8.81 C. Original price = $57.41 Markdown amount = $7.49 D. Original price = $58.73 Markdown amount = $8.81