<h2>
<u>Answer</u><u> </u><u>:</u></h2>
Option (2) and Option (3) is the correct answer .
<u>Requ</u><u>ired</u><u> </u><u>Ex</u><u>plaination</u><u> </u><u>:</u>
Scenario 2 : The height of a stone shot by a catapult reaches a maximum height and then falls on the ground.
- The graph of this scenario is a downward parabola. Therefore option 2 is correct.
Scenario 3 : The sale of product increases at first and then decreases.
- The graph of this scenario is a downward parabola. Therefore option 3 is correct.
<u>Therefore, the correct options are </u><u>2</u><u> </u><u>and</u><u> </u><u>3</u><u>.</u>
Range is all the values of y, in this case, y can be any number, so the range is all real numbers.
Let the slower train's velocity be x-21
Let the faster train's velocity be x
We know that the approach speed is the sum of both speeds, so x+x -21= 2x-21.
The approach rate is given by Distance/time = 471/3 = 157mpH
x+x-21=157
2x=157+21
2x=178
x=89mph
The slower train is travelling 89-21 = 68mph
The faster train is travelling 89mph.
Hi. Here it is!
I hope this help...
—> And the answer is letter A
