A firecracker shoots up from a hill 150 feet high with an initial speed of 95 feet per second. Using the formula H(t) = −16t2 + vt + s, determine how long it will take the firecracker to hit the ground.

Question

nottim · Answer

1. Let's draw a diagram.
2. LEt's make a variables list
3 Find der formulas tu need!

nottim · Answer

4. Solve it! remember which formulas need to be 'combined'!

anonymous · Answer

Do you just want the answer?

nottim · Answer

blue bird! go back to your other question! THIS MA TOWN!

nottim · Answer

oooh wait. this aint physics...

anonymous · Answer

How would i make a variables list?

nottim · Answer

you just need to find the end points!

anonymous · Answer

I'm confused :o

anonymous · Answer

I thought you only plug in the numbers to the equation but i'm unsure if that's correct or how to do it even if it is correct

nottim · Answer

v=95 ft/s
H(t)=150

nottim · Answer

solve for s!

nottim · Answer

wait...what's s? solve for t, silly me

anonymous · Answer

ok but there is also a s!?

anonymous · Answer

I tried to solve but i'm soooo confused

lgbasallote · Answer

let H(t) = 0

then solve for t

nottim · Answer

really? shoot. I suck at even trinomials now huh

nottim · Answer

maybe s is given elsewhere in your textbook

anonymous · Answer

no it isn't :o

anonymous · Answer

@Romero yes please can i have the answer

nottim · Answer

@lgbasallote wat is s?

lgbasallote · Answer

i'd like to say it's the distance traveled

anonymous · Answer

Is the answer 7.2 seconds?

nottim · Answer

dunno. doesnt your txtbook ahve the answer?

anonymous · Answer

no @lgbasallote is the answe 7.2s ?!

anonymous · Answer

i'm doing an online course not from a textbook!

lgbasallote · Answer

lol shouldnt @NotTim be answering this o.O 

wait..ill check

nottim · Answer

i dont wanna do math...

lgbasallote · Answer

it;s what my calculator said

anonymous · Answer

ok thank you all :)