Solve the problem.One fifth of Joe's earned income is deducted for withholdings. One third of the withholdings are for social security (FICA). What fraction of Joe's earned income is deducted for social security?
A. 
B. 
C. 
D. 
Answer: D
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Find the value of the constant k so that the given function in a probability density function for a random variable over the specified interval. f(x) = 
over [1, 18]
A. ln 18
B. 
C. 
D. 1 - ln 18
Find the equation of the parabola determined by the given information.Vertex at the origin, focus at (
, 0)
A. y2 = 24x
B. y = 
x2
C. x2 = 24y
D. x = 
y2
Use a calculator to solve the equation on the interval 0 ? ? < 2?. Round the answer to two decimal places.sin ? = -0.48
A. {0.50, 5.78} B. {3.64, 5.78} C. {0.50, 3.64} D. {0.50, 2.07}
Solve the problem.The half-life of an element is 4.2 × 1011 yr. How long does it take a sample of the element to decay to 
of its original mass? Use 
where A0 is the initial amount, T is the half-life, and t is the time. (Express results in scientific notation, rounded to the nearest hundredth.)
A. 1.49 × 1011 yr B. 7.66 × 1010 yr C. 3.22 × 1011 yr D. 3.10 × 1011 yr