A rocket is launched from atop a 65 foot cliff with an initial velocity of 144 ft/s. The height of the rocket above the ground at time t is given by h=-16t^2+144t+65. When will the rocket hit the ground after it is launched?

step-by-step explanation:

you divide the denominator by the numerator on both sides and if the quotients are equal then the fractions are equivalent

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

answer: there are 453.592 grams in a pound.