E ( X )
The random variable X has the probability density function 
over [0,?) .
Compute the following quantity.
0.25
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Use a calculator to evaluate the natural exponential function. Round your answer to the nearest hundredth.e2
A. 0.69 B. 8.17 C. 5.44 D. 7.39
Calculate the derivative of the function. Then find the value of the derivative as specified.g(x) = x3 + 5x; g '(1)
A. g '(x) = 3x2 + 5x; g '(1) = 8 B. g '(x) = 3x2; g '(1) = 3 C. g '(x) = 3x2 + 5; g '(1) = 8 D. g '(x) = x2 + 5; g '(1) = 6
Solve the problem.A sample of 400 grams of radioactive substance decays according to the function 
where t is the time in years. How much of the substance will be left in the sample after 10 years? Round your answer to the nearest whole gram.
A. 12 g B. 1 g C. 282 g D. 0 g
Find the value of the expression.log2222
A. 1 B. 10 C. 0 D. 22