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professor190 [17]
3 years ago
7

A swimming pool has to be drained for maintenance. The pool is shaped like a cylinder with a diameter of 10m and a depth of 1.4m

. Suppose water is pumped out of the pool at a rate of 18 m3 per hour. If the pool starts completely full, how many hours will it take to empty the pool?
Mathematics
1 answer:
Volgvan3 years ago
7 0

Answer:

6.1 hrs

Step-by-step explanation:

Volume of the cylinder = pi * (10/2)^2 * 1.4 m^3 = 109.956 m^3

So, time required = 109.953/18 hrs = 6.108 hrs ≈ 6.1 hrs

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A student spend $56.35 on school supplies at a store where the sales tax is 6.5%. What is the total cost of the supplies?
ArbitrLikvidat [17]

Answer:

$60.01

Step-by-step explanation:

To find tax you first multiply the original price x the tax(make sure to change it into a decimal)

56.35 x 0.065 =3.66

Then you add the original price and the result.

56.35 + 3.66 = $60.01

7 0
3 years ago
Work out m and c for the line: y = 6 x
klemol [59]

Answer:

<em>m</em> = 6

<em>c</em> = 0

General Formulas and Concepts:

<u>Algebra I</u>

Slope-Intercept Form: y = mx + c

  • m - slope
  • c - y-intercept

Step-by-step explanation:

<u>Step 1: Define</u>

y = 6x

↓ Compare to Slope-Intercept Form

Slope <em>m</em> = 6

y-intercept <em>c</em> = 0

7 0
3 years ago
Ralph is an electrician. He charges an initial fee of $24, plus $24 per hour. If Ralph earned $144 on a job, how long did the jo
MakcuM [25]
24+24x=144
24x=120
x= 5 hours. As a result, the job take 5 hours. Hope it help!
5 0
3 years ago
Your work or words should justify your answer (explain how you know). As a math teacher, Josie frequently makes photocopies of f
Doss [256]

Answer:

Yes, because by dividing x by his equivalent y, you find a constant of proportionality being 10.

x / y = 10

Step-by-step explanation:

20 / 2 = 10

50 / 5 =10

60 / 6 = 10

70 / 7 = 10

7 0
3 years ago
What is the equation the following line
Bumek [7]

Answer:

y=9x

Step-by-step explanation:

This is the slope-intercept form y-mx+b where m stands for the slope and b stands for the y-intercept. The slope in the picture is 9/1 or just 9 simply. The y-intercept, or where the line crosses the y-axis is at 0 so you don't have to write if there's a 0.

Hope this helps

4 0
3 years ago
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