A, and b are correct. c could be but, it is not summer all over the world. for d it is Boston, Massachusetts (city,state)
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What kind of question is that
H(x)=-16t^2+300
The average rate is the change in h divided by the change in t, mathematically:
r=(h(3)-h(0))/(t2-t1), in this case:
r=(-16*9+300-0-300)/(3-0)
r=-144/3
r= -48 ft/s
None because it is impossible for any triangle to have more than one obtuse angle.
