1.9.PS-16 Question Help
o
4
Challenge Between 9 PM. and 6:20 AM, the water level in a swimming pool decreased by
in
9
Assuming that the water level decreased at a constant rate, how much did the water level drop
each hour?

0.0625 Inches

Step-by-step explanation:

Divide the decrease in water level by the length of the time interval.

decrease = 7/12 inches ≅ 0.583 inches

Time interval: From 11 pm to 8:20 am you have 9:20 hours = (9 + 20/60) hours ≅ 9.33 hours

So the water drops at a rate of about

0.583/9.33 inches/hour ≅ 0.0625 inches/hour

That means that each hour it drops about 0.0625 inches.

35x 3= 105

step-by-step explanation:

35+35= 70   70 + 35= 105

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm