Casey is at a bat, and hits home run ball. The height of the ball in feet can be modeled by the function h(t) = -9t^2 + 72t, where t is time in seconds. But wait! Jim the center field jumper leaps into the air according to the function g(t) = -15t^2 + 240t -951 a. use a graphing calculator to sketch the two graphs and find the intersection. b. did Jim time his jump right to catch the ball? c. if the fence is 8 ft high, did Jim jump high enough to catch the ball and prevent the home run? d.what assumptions are we making if we concluded that Jim caught the ball?

Question

anonymous · Answer

i says use a graphing calculator, go ahead and graph them

anonymous · Answer

http://www.wolframalpha.com/input/?i=-9t^2+%2B+72t%2C-15t^2+%2B+240t+-951

solomonzelman · Answer

Ti83 would be ideal for this, to set a x-scale 1 and y scale by 12

anonymous · Answer

if you want to know where they are equal, put an equal sign between them, even easier http://www.wolframalpha.com/input/?i=-9t^2+%2B+72t%3D-15t^2+%2B+240t+-951+

anonymous · Answer

ok I got the intersept as (7.88,8.77)

anonymous · Answer

not sure about the y but the t is right for sure

anonymous · Answer

or rather the $h$ 
could be though

anonymous · Answer

would c. be right since the y value in the intersept is greater than 8 

not sure about b or d

anonymous · Answer

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anonymous · Answer

@happy_go_swimmer