15) x=31/10
16)x=2
17)x=16/3
18)x=-2
19)2.5 hours
20) 32 hours
I believe the answer is Diane brought 4 pounds of coffee.
Answer:
D. 16
Step-by-step explanation:
Average rate of change: 
Simply plug in 6 for <em>a</em> and 2 for <em>b</em>
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their is no answer
to that problem
Answer:
C≈6.28mm
Step-by-step explanation:
C=2πr
= 2·π·1≈6.28319mm