Question

PLEASE HELP
A tunnel is in the shape of a parabola. The maximum height is 16 m and it is 16 m wide at the base as shown below.

What is the vertical clearance 7 m from the edge of the tunnel?

Answer 1

@KingGeorge my computer won't let me see your last comment!

Answer 2

The whole thing or just part of it?

Answer 3

You got up to 10.9 but that's not the final answer

Answer 4

15.4 m

0.3 m

15.7 m

0.6 m

Answer 5

those are the answer choices

Answer 6

Uhhh... One moment.

Answer 7

I'm pretty sure I know which of those it wants (only because I made a mistake that got me one of those), but I am very positive that none of them are actually correct.

Answer 8

eeeeek so which one are you thinking?

Answer 9

15.7

Even though the actual quadratic equation is \(-x^2/16\), they used the equation \(-x^2/16^2\). If you used this (incorrect!) equation, you get 15.7

Answer 10

Okay I'll go with that! Thank you(: Are you good with orthogonal and parallel vectors? because I'm stuck on my last question

Answer 11

It depends on the question, but I would hope I could handle it.

Answer 12

u = <7, -4>, v = <-28, 16>

Answer 13

orthogonal, parallel, or neither

Answer 14

I think this is a little easier than you think it might be.

Two vectors \(\vec{u},\vec{v}\) are parallel if there is some real number \(n\) such that \(n\vec{u}=\vec{v}\).

Two vectors \(<a,b>\) and \(<c,d>\) are perpendicular if \(ac+bd=0\).

Using that information, what do you think the correct solution would be?

Answer 15

parallel?

Answer 16

Right! And why?

Answer 17

ILY! <3333333

Answer 18

You're welcome =D