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Math·Algebra·Linear inequalities in one or two variables

easy

On a certain day in June, the lowest recorded wind speed in a town was $9$ miles per hour (mph) and the highest recorded wind speed was $20$ mph. Which inequality is true for all values of $w$, where $w$ represents any wind speed, in mph, recorded in the town on this day?

A

$w\le 9$

B

$w\le 11$

C

$w\ge 20$

D

$9\le w\le 20$