Which of these is an example of a discrete random variable 1) hours worked at job, weight of a child, number of siblings, length of a fish

hours worked at job, number of siblings are examples of discrete random variable.

Step-by-step explanation:

Discrete random variable has values that can be counted. It has finite data that does not change continuously.

Hours worked at a job can be counted at the end of the day.

The weight of a child keeps changing continuously therefore it is not a discrete random variable.

Number of siblings can be counted.

The length of a fish can keep changing day by day therefore it is not a discrete random variable.

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256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

7

step-by-step explanation: