What is the probability of an event that is certain?

1

Step-by-step explanation:

An event that is certain to happen has a probability of 1.

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step-by-step explanation:

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for this case we have that by definition, the volume of a cylinder is given by:

where:

r: it's the radio

h: it's the height

we have as data that:

substituting:

so, the cylinder volume is

option d