A swimming pool is 50 m long and 20 m wide. Its depth decreases linearly along the length from 9 m to 1 m. It is initially empty and is filled at a rate of 1 m/min. How fast is the water level rising 90 min after the filling begins?
How long will it take to fill the pool?

c.35

step-by-step explanation:

8+13=21

21+8=29

29+6=35

c - they will have the same distribution

step-by-step explanation:

this is the only one that could make sense. : )

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

b, 20 yards

step-by-step explanation: