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Math·Algebra·Linear inequalities in one or two variables

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During a portion of a flight, a small airplane’s cruising speed varied between 180 miles per hour and 190 miles per hour. Which inequality best represents this situation, where $s$ is the cruising speed, in miles per hour, during this portion of the flight?

A

$s\le 10$

B

$s\le 180$

C

$s\le 190$

D

$180\le s\le 190$