1. Which animal had to exert the most work in raising the water?
2. Which animal had to exert the greatest power to raise the water?
3. A motor is rated at 1500 Watts and a second motor is rated at 2200 Watts. If they each needed to lift a 100 kg box 20 meters, which one would do the most work?
4. A motor is rated at 1500 Watts and a second motor is rated at 2200 Watts. If they each needed to lift a 100 kg box 20 meters, which one would get the job done first?
5. convert each of your power values, which are in Watts, to horsepower by the conversion given earlier: 1 hp = 746 Watts

1. the ox

2. the horse

3. 1,500 watts would do the most work

4. 2,200 watts would get the job done first

5. 2,200 watts = 2.94HP

1,500 watts = 2.01HP

hope i helped :)

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

its kind of blurry. can you put a clearer pic?

step-by-step explanation: