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All of the above are true
Answer:
7
Step-by-step explanation:
First, plug-in f(-3) into t in the function:

Second, multiply -2 and -3 to get 6:
⇒
Third, add 6 and 1 to get your answer:
⇒
The average speed for the trip is 11 miles per hour, or mph. 99 miles divided by 9 is 11
1 decigram = 100 milligrams
6 decigrams = 600 milligrams