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strojnjashka [21]
3 years ago
10

between 9 p.m. and 6:36 a.m.​, the water level in a swimming pool decreased by 6/25. assuming that the water level decreased at

a constant​ rate, how much did the water level drop each​ hour?
Mathematics
1 answer:
Licemer1 [7]3 years ago
8 0

Answer:

The hourly drop between the two times is 1/40

Step-by-step explanation:

Firstly, we need to find the difference in time between 9 pm and 6:36 am

That would be 9 hours and 36 minutes

It would be needed to convert 36 minutes to hours

Mathematically, 60 minutes = 1 hour

So 36 minutes = (36 * 1)/60 = 36/60 = 0.6

So the difference between the two time is simple 9.6 hours

So the total drop during the time is given by 6/25

So the hourly drop will be 6/25 divided by 9.6

= 6/25 * 1/9.6 = 6/240 = 1/40

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Lee worked a total of 30 hours at two jobs last week her combined pay from the jobs was $240 she earned $9 per hour working at t
Sonja [21]

Answer:she spent 10 hours working in her aunt's store last week.

Step-by-step explanation:

Let x represent the number of hours that Lee spent working at the movie theater.

Let y represent the number of hours that Lee spent working at her aunt's store.

Lee worked a total of 30 hours at the movie theater and her aunt's store. This means that

x + y = 30

Her combined pay from the jobs was $240. She earned $9 per hour working at the movie theater and $6 per hour working in her aunt's store. This means that

9x + 6y = 240 - - - - - - - - - -1

Substituting x = 30 - y into equation 1, it becomes

9(30 - y) + 6y = 240

270 - 9y + 6y = 240

- 9y + 6y = 240 - 270

- 3y = - 30

y = - 30/ - 3 = 10 hours

3 0
3 years ago
Can someone plzzz answer these questions with showing work?
snow_lady [41]
So what you got to do is divide them perseay use a calculator for the first one 2/15 what would that be in a decimal 0.13333333333333 what ever on has 0.13333333  or something else repeating that is the one that you will circle 11/20=0.55   17/40 =0.425 1/2=0.5 so you answer would be 2/15
hope this helped
7 0
3 years ago
The lenght of an arc in a circle with radius 8 inches is 3.2π. determine the measure of the arc​
aleksandrvk [35]

Answer:

72

Step-by-step explanation:

32pi×360/2pi(8)=72

central angle= arc length 360/2pi×r

8 0
3 years ago
Sue invests £9000 in an account for one year.
Anika [276]

Answer:

£151.20

Step-by-step explanation:

20%= 100%divided by 5

To find 100% from 20% you x by 5

so you times 30.24 by 5

30.24x 5 = 151.2

So the answer is £151.20

interest percentage rate would be 1.6754%

3 0
3 years ago
What is the name given to this shaded region
vlabodo [156]

Answer:

The name given to the shaded region would be the positive interval because all f(x) values in that region are positive.

7 0
3 years ago
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