Question

h(t)=-15t^2+105t+10,0 13 years ago

Answer 1

can someone help me please

Answer 2

190 =-15t^2+105t+10
rearranging
15t^2 - 105t + 180 = 0
you need to solve this equation for t

Answer 3

how do I do that

Answer 4

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

Answer 5

so the tshirt will reach the fan at 3 seconds

Answer 6

yea and again at 4 seconds

Answer 7

unless it gets sucked into the fan in 3 seconds!

Answer 8

if so its just as well its a tshirt