Write an equation that expresses the relationship. Use k as the constant of variation.a varies directly as m.
A. k = am
B. a = 
C. m = 
D. a = km
Answer: D
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Perform the indicated operation.2.99 kg - 162 g (in kg)
A. 2828 kg B. 2.828 g C. 137 g D. 2.828 kg
Write the exponential equation as an equation involving a common logarithm or a natural logarithm.12x = 144
A. log12 144 = x B. log x = 12 C. log14412 = x D. logx144 = 12
Solve.On one summer's day the high temperature recorded in Death Valley, California was 112° F. On the same day, the high temperature recorded in Montreal, Canada was 22° C. How much hotter was Death Valley than Montreal on that day? Give your answer in degrees Fahrenheit. Round to the nearest tenth of a degree.
A. 67.8°F B. 14.8°F C. 22.4°F D. 40.4°F
Solve the problem. Give an exact answer and an approximation to the nearest tenth.A painter leans a ladder against one wall of a house. At what height does the ladder touch the wall?
A. 
ft ? 15.9 ft
B. 
ft ? 30.0 ft
C. 
ft ? 2.4 ft
D. 
ft = 126 ft