Answer:
Y =72
Step-by-step explanation:
Y/8+4=13
Subtract 4 from each side
Y/8+4-4=13-4
Y/8 = 9
Multiply by 8
Y/8*8 = 9*8
Y =72
Just multiply 42 by 10 and that gives you 420 , so the real car has a length of 420cm or 4.2 metres :)
Step-by-step explanation:
I believe the answer you are looking for is 4^15. I'm not 100% sure though.
Hope it helps!
The given
equation in this case is:
<span> y = -16 t^2 + 400</span>
We can see
that the slope of the equation is negative (-16) which means that the position
of Kay is on the positive y-axis , while the bottom of the river is in the
origin. This is supported by taking t = 0, the initial y becomes y = 400.
Therefore the position of Kay now is at (0, 400).
So to find
for the time when the camera hits the water, then y must be zero (t, 0) so we
have to find for t in this case.
When y = 0
0 = -16 t^2
+ 400
16 t^2 = 400
t^2 = 25
t = 5 s
<span>Therefore it
takes 5 seconds for the camera to hit the water and for Kay to see a splash.</span>
