How to find 450 is 75.2% of what number

Collin did the work to see if 10 is a solution to the equation r/4=2.4

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is