Follow the principles of estimation to find an approximate value.Round the percent to the nearest one and dollars to the nearest ten thousand.Find 4.2% of $43,665.24.
A. $1833.94
B. $1600.00
C. $160,000.00
D. $16,000,000.00
Answer: B
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Solve.How many cubic yards of concrete are needed to pour a concrete slab 24 feet long, 14 feet wide and 8 inches thick? Round to the nearest tenth.
Fill in the blank(s) with the appropriate word(s).
Use a graphing utility to solve the system of linear equations and give the solution of the system.
A. 
x = 9, y = 5, z = 1
B. 
x = 
, y = - 
, z = 9
C. 
x = 1, y = 5, z = 9
D. 
x = 
, y = - 
, z = 9
Factor completely, or state that the polynomial is prime.9x3 - 9
A. 9(x3 - 1) B. 9(x - 1)(x2 + x + 1) C. 9(x + 1)(x2 - x + 1) D. prime
Solve the problem.Let I0 be the intensity of sound at the threshold of human hearing. The decibel level of a sound with intensity I is given bydB = 10 log10
.If the intensity of a sound increases by a factor of 8, how is the decibel level affected? Round your answer to the nearest tenth.
A. The decibel level increases by 1.9. B. The decibel level increases by 0.8. C. The decibel level increases by 9.0. D. The decibel level increases by 0.9.