Between 10 p. m. and
7: 45 a. m., the water level in a swimming pool
decreased by 13/16 inch.
assuming that the water level decreased at a
constant rate, how much did it drop each hour?

The water level dropped inch each hour

Step-by-step explanation:

- Between 10 P.M. and 7:45 A.M., the water level in a swimming pool

  decreased by 13/16 inch

- Assuming that the water level decreased at a  constant rate

- We need to find the drop each hour that means the unit rate of

  decreased of the level of the water

- At first lets hind how many hours between 10 P.M. and 7:45 A.M.

∵ Between 10 P.M. and mid-night 2 hours

∵ Between mid-night and 7:45 A.M. 7 hours and 45 minutes

- Lets change 7 hours and 45 minutes to hours

∵ 1 hour = 60 minutes

∴ 45 minutes = 45 ÷ 60 = hours

∴ 7 hours and 45 minutes = hours

∴ The total hours between 10 P.M. and 7:45 A.M. = 2 + hours

∴ The total hours between 10 P.M. and 7:45 A.M. =

∵ The unit rate of decreased = The decreased level ÷ total hours

∵ The decreased level is inche

∵ The total hours = hours

- Lets change the mixed number to improper fraction

∵ =

∴ =

∵ The unit rate of decreased =   ÷  

- To solve the division of 2 fractions change the division sign to

   multiplication sign and reciprocal the fraction after the division sign

∴ The unit rate of decreases =   ×

∴ The unit rate of decreases = inch per hour

The water level dropped inch each hour

inches per hour.

Step-by-step explanation:

Between 10 P.M. and 7:45 A.M., the water level in a swimming pool decreased by   inch.

First we calculate the hours between 10:00 P.M and 7:45 A.M.

10:00 P.M. = 22:00 P.M.

10:00 p.m. + 2 hours = 12:00 a.m.

so 2 hours + 7 hours and 45 minutes = 9 hours 45 minutes

9 hours 45 minutes =   =   hours

It takes   hours to decrease the water level by   inches.

In 1 hour the water level would decrease =

=   ×  

=                                                          

=  

=   inches/hour

The water level decreased at a inches each hour.

what do you mean by fog

step-by-step explanation:

first one because it can't have a fraction in it

step-by-step explanation: