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cdelomas
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h(t)=15t^2+105t+10,0<t<10. find the times when the tshirt will reach a fan 190 feet abouve ground level. The tshirt will reach the fan at how many seconds.
 one year ago
 one year ago
cdelomas Group Title
h(t)=15t^2+105t+10,0<t<10. find the times when the tshirt will reach a fan 190 feet abouve ground level. The tshirt will reach the fan at how many seconds.
 one year ago
 one year ago

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cdelomas Group TitleBest ResponseYou've already chosen the best response.0
can someone help me please
 one year ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
190 =15t^2+105t+10 rearranging 15t^2  105t + 180 = 0 you need to solve this equation for t
 one year ago

cdelomas Group TitleBest ResponseYou've already chosen the best response.0
how do I do that
 one year ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
ok first take out the common factor 15 to simplify the problem: 15(t^2 7t + 12) = 0 now we have to solve the trinomial in the parentheses we need 2 numbers whose product id +12 and whose sum is 7 these are 4 and 3 so it factors to ( t  4)(t  3) = 0 ginig t = 3 and t = 4 so your required times are 3 seconds and 4 seconds
 one year ago

cdelomas Group TitleBest ResponseYou've already chosen the best response.0
so the tshirt will reach the fan at 3 seconds
 one year ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
yea and again at 4 seconds
 one year ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
unless it gets sucked into the fan in 3 seconds!
 one year ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
if so its just as well its a tshirt
 one year ago
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