00:01
All right, so on this problem, if you remember from the last one, we got the parabola into this standard form.
00:06
And then now we're told that the jet is starting at zero, zero.
00:09
We want to know what is the horizontal distance traveled from zero to the last part of its descent.
00:17
It's when it hits their ground again.
00:20
Now, when it hits their ground again, it's y value is going to be zero.
00:23
Why represents its height, and so it's y value will be zero.
00:26
And so if we want to find where it's hitting the ground next, we plug in zero for y.
00:34
And then now let's simplify that left that right -hand side the left -hand side just stays x minus 660 squared and then on the right -hand side you just evaluate four times negative 125 divided by 12 times negative 10 ,500 and that gives us 437 ,500 now we need to take the square root of both sides there on the left it's just going to give us x minus 660 on the right when you take the square root of both sides.
01:15
Of 437 ,500...