15

suppose this firework is set to explode 3 seconds after it is launched. at what height will this firework be when it explodes?
my equation is h(t)=-16t^2+120t+20

how do i do this?

The verbal translation for the difference of m and 7 increased by 15

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Which shows the correct substitution of the values a, b and c from the equation 1=-2x+3x^2+1