Divide.21 ÷ 4
A. 6.25
B. 5.25
C. 5
D. 0.525
Answer: B
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Solve the problem.Find the half-life of the radioactive element radium, assuming that its decay constant is 
with time measured in years.
A. 1600 years B. 2308 years C. 800 years D. 1400 years
Classify the real number as a natural number, whole number, integer, rational number and/or irrational number. The number may belong to more than one set.21.7
A. rational number B. irrational number C. whole number D. integer, rational number
Provide an appropriate response.There are two methods, the wage bracket tables and the percentage, for calculating the amount of federal income tax.
A. True B. False
For the given functions f and g , find the indicated composition.f(x) = -4x + 9,g(x) = 5x + 3(g?f)(x)
A. 20x + 48 B. -20x + 21 C. -20x - 42 D. -20x + 48