Question

Fan and Medal! :)

Sandra is riding the Ferris wheel, and her height can be modeled by the equation H(t) = 25 cos[(pi/14)t] + 31, where H represents the height of the person above the ground in feet at t seconds.

How far above the ground is Sandra before the ride begins?

Answer 1

I thought that I would be substituting t for 0, and then solving, but I got stuck >_<
Right now I have 25 cos(0) + 31

Answer 2

@ganeshie8 @Tootles143 @pooja195
Please can someone help me? :(

Answer 3

@77777jeannie77777 @cupcakerain @Gokuporter @Awolflover1

Answer 4

@amilapsn @Omar_Elboredy

Answer 5

cos(0) = 1 so assign it and you have the height

Answer 6

So .. What before the ride begins mean ?
It means that just starting the ride which implies that it is wanted to get the height at time(t) = 0
then substituting back into the equation with this time you will get :

H(0) = 25 cos( (π/14)*0 ) + 31 = 25 cos(0) + 32 = ?
Solve it Urself ! :D

Let me know if you got it :)

Answer 7

*31

Answer 8

I got 25 32. But I don't know what to do about the space :/

Answer 9

25+ 32

Answer 10

Your equation after subs. by t = 0 will be sth like that : 25 cos(0) + 31 = ....
Ok ?

Answer 11

It's 31 not 32 , I re-corrected it ! :D

Answer 12

Wait so do I add them to get the height or do I leave it as an equation??

Answer 13

You have to add them to get the height

Answer 14

yeah t=0
H(0) = 25+32
= 57 which is the height at t=0

Answer 15

Ok thank you guys :) And since it doesn't give a unit of measure, I just say 57 units, right?

Answer 16

"H represents the height of the person above the ground in ""feet"" "
The given unit is "feet" ! :)
So the answer will be : 57 feet above the ground

Answer 17

Oh I can't believe I missed that >_< thanks again!