Write the statement in algebraic form.13 more than a number
A. 13n
B. n + 13
C. n - 13
D. 13 - n
Answer: B
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Provide an appropriate response.The standard normal probability density function is defined by f(x) = 
e-x2/2. (a) Show that 
dx = 
.(b) Use the result in part (a) to show that the standard normal probability density function has mean 0.
What will be an ideal response?
The figure shows the velocity v or position s of a body moving along a coordinate line as a function of time t . Use the figure to answer the question. v (ft/sec)
When is the body moving backward?
A. 4 < t < 7 B. 0 < t < 2, 6 < t < 7 C. 0 < t < 4 D. 7 < t < 10
Estimate the indicated probability.A survey was done at a mall in which 2000 customers were asked what type of credit card they used most often. The results of the survey are shown in the figure below: 
Determine the empirical probability that a person selected at random from the 2000 surveyed uses no card. Round to the nearest ten-thousandth when necessary.
A. 0.0005 B. 0.025 C. 0.05 D. 0.005
Simplify the exponential expression.
A. x7 B. 5x6 C. x6 D. 5x7