Question

f(t)=-16t to the power of 2+ 80t +5


t=time
what is the time when the ball hit the ground
4.9,5.1,or what

Answer 1

What are you trying to do?

Answer 2

find how long it took for a ball to hit the ground

Answer 3

ah ok. What function does f(t) represent?

Answer 4

i dont know what f equals but t= time

Answer 5

It's not f times t

Answer 6

it's f of t

Answer 7

it's a function

Answer 8

no its f times t but i dont know what f represents

Answer 9

but what it represents is the question. And no it is not f times t

Answer 10

oh ok

Answer 11

you can have f(t), g(t), f(x), etc all of those are ex of that style of writing an eq. You say it like this: The function f of t, g of t, f of x, yada yada yada

Answer 12

that makes sense

Answer 13

so example you know the slope intercept form of a line?

Answer 14

yes

Answer 15

what is it real quick?

Answer 16

y=mx+b

Answer 17

ok so y is a function that depends on x, do you understand that?

Answer 18

yes

Answer 19

so i could write, f(x)=mx+b and that would be the same thing

Answer 20

do you see?

Answer 21

kinda

Answer 22

ok, what part has you not so sure?

Answer 23

oh ok i see it know

Answer 24

now

Answer 25

they depend on each other

Answer 26

k so, what I need to know, is what f(t) represents, it could be velocity, position, acceleration, or a few other things

Answer 27

i believe its velocity

Answer 28

I'm here for almost the same problem lol.

Answer 29

haha

Answer 30

ok, so if it is velocity, this problem is not of your capability level with the given info unless you were given some other information, did you leave anything out?

Answer 31

i dont think so it might be acceleration tho

Answer 32

no it isn't acceleration. Can you please post the whole problem

Answer 33

you are missing some very important info

Answer 34

i'm quite sure it represents position. i dont think any sane human being with give someone a problem that has an acc. function of the second order, implying the position function is of fourth order

Answer 35

but we can verify

Answer 36

ok

Answer 37

i did

Answer 38

I don't think you did, like I said, given the info, this problem is not solvable. Please write the question word for word

Answer 39

a ball is kicked in the air how long will it take the ball to hit the ground in seconds with this equation
f(t)+-16t

Answer 40

ok, now we are getting somewhere

Answer 41

so we have \[f(t)=-16t^2+80t+5\]

Answer 42

yes

Answer 43

now, what other info did it give?

Answer 44

thats it and it wants to know how long it will take the ball to hit the ground and it gave me some times 4.9,and 5.1

Answer 45

the times are important

Answer 46

what does it say about those times?

Answer 47

it just says what is the answer

Answer 48

just saying but this is more of a physics question so you might have better luck there

Answer 49

ok

Answer 50

uh, no element.

Answer 51

it is both a simple physics and a simple math

Answer 52

but without more info, you cannot do the problem.

Answer 53

ok well thanks for trying

Answer 54

you are given a function which the way you have it phrased, does tell you what it represents. , you are not told what the 'ground' is, nor where it is, also the path of motion forms a parabola yes,