Solve the problem.For a circle of radius 4 feet, find the arc length s subtended by a central angle of 30°. Round to the nearest hundredth.
A. 2.09 ft
B. 6.28 ft
C. 376.99 ft
D. 4.19 ft
Answer: A
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Factor the expression by removing the common factor with the smaller exponent.
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A. 
B. ?
C. ?
D. ?
E. ?
Find the domain and range.{(-1,4), (-1,-9), (-11,2), (-7,3), (-5,9)}
A. domain = {-1, 12, -11, -5, -7}; range = {-9, 2, 9, 3, 4} B. domain = {-1, -2, -11, -5, -7}; range = {-9, 2, 9, 3, 4} C. domain = {-9, 2, 9, 3, 4}; range = {-1, -1, -11, -5, -7} D. domain = {-1, -11, -5, -7}; range = {-9, 2, 9, 3, 4}
State the phrase as a mathematical expression. Use x to represent the variable.The product of nine and five more than a number
A. 9 + 5 ? x B. 9 ? 5 + x C. (9 + 5)x D. 9(x + 5)
Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.Assume that the volume of the earth is 5 × 1014 cubic meters and the volume of a bacterium is 2.5 × 10-16 cubic meters. If the earth could be filled with bacteria, how many would it contain?
A. 2.0 × 10-30 bacteria B. 2.0 × 1030 bacteria C. 5.0 × 10-31 bacteria D. 5.0 × 1031 bacteria