82. Height of a Projectile A projectile is fired straight upward from ground level with an initial velocity of
128 feet per second.
(a) At what instant will it be back at ground level?
(b) When will the height be less than 128 feet?
(This is high school level not college)

-4

step-by-step explanation:

do 6-10=

if u need it to be negative.

b. x + 1

step-by-step explanation:

i'am smart

answer: 10 meter

step-by-step explanation:

need details

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.