I believe there's a mistake in the equation shown, the acceleration (number that multiplies t²) should be negative, since the stone is falling, therefore I'll answer assuming it's -16 instead of 16, otherwise there would be no real solution to the equation.

In order to calculate how long it'll take for the stone to hit the ground we must make f(t) = 0 and find the time "t" that makes the equation valid, so we have:

f(t) = -16t² + 248 = 0

-16t² = -248

t² = -248/(-16) = 15.5

t = sqrt(15.5) = 3.94

7 0

3 years ago

marissa wants to purchase song for hee ipod songs on itunes cost $1.25 each marisa found anothee webside called mp3 golore that

prisoha [69]

The equaton for cost is

first website is 1.25x
2nd is x+3

I'm assuming what number of songs wil make them have same cos
1.25x=x+3
minus x from both sides
0.25x=3
divide both sides by 0.25
x=12
answer is 12 songs must be purchased to spend the same on each website

8 0

3 years ago