QI: The number of e-mail messages received per hour has the following distribution: Xnumber of messages I1 12 13 14 15 10 0.08 0.15 0.30 0.20 0.20 0.07 (a) Find P(x > 11), P(xS 12), P(14 SxS 16) (b) Determine the mean and standard deviation of the number of messages received per hour. (c) Suppose that each e-mail message header reserves 15 kilobytes of memory space for storage. Let the random variable Y denote the memory space reserved for all message headers per hour (in kilobytes). Determine the mean and standard deviation of Y.

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A: From the given information, N0=15 mg, N=5.5 mg ant t=24 minutes. It is known that, the radioactive…

Q: I don't fully understand what you did for problem C

A: The answer is in step2.

Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.