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The height h (t) above ground (in yards) of a hellum-
filled balloon t seconds after release is shown in the
table.
What is the average rate of change of the balloon from
t = 7 seconds to t = 15 seconds?
O 0.8 yd/sec
O 0.4 yd/sec
O2.14
yd/sec
O 1.25 yd/sec
O 1.59 yd/sec
t
h(t)
5
12
7
17
11 13 15 18
27 30
21
24
