Work Step by Step
$20\leq$C$\leq30$ Substitute C=5/9(F-32) [GIVEN] Multiply by 9/5 Add 32 $68\leq$F$\leq86$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.