Answer:
5.Area=1/2×b×h
Area=1/2×18×7
Area=63feet²
6.A=1/2(b1+b2)h
60=1/2(8+12)h
120=20h
h=6m
7.V=lwh
w=V/lh
w=1890/10×14
w=1890/140
w=189/14
w=17/2
w=8.5m
8.d=rt
320miles=r×5hrs
r=320/5
r=64miles/h
9.
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