Perform the indicated calculation. Express your answer using scientific notation.(3 × 109)(8 × 109)
A. 24 × 1019
B. 2.4 × 1019
C. 2.4 × 1018
D. 24 × 1081
Answer: B
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Complete.6 yd2 = _______ ft2
A. 54 B. 216 C. 18 D. 2.0000
Find an equation of variation for the given situation.y varies directly as x and inversely as z, and y = 14 when x = 2 and z = 8.
A. y = 
B. y = 59xz
C. y = 
D. y = 
Find the unknown length in the right triangle. If necessary, round to the nearest tenth.
A. 122 in. B. 11 in. C. 244 in. D. 15.6 in.
Solve the problem.Jarod is having a problem with rabbits getting into his vegetable garden, so he decides to fence it in. The length of the garden is 9 feet more than 2 times the width. He needs 42 feet of fencing to do the job. Find the length and width of the garden.
A. length: 19 feet; width: 5 feet B. length: 31 feet; width: 11 feet C. length: 17 feet; width: 4 feet D. length: 15 feet; width: 3 feet