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barxatty [35]
3 years ago
14

An arc length is a fractional part of the

Mathematics
1 answer:
LenaWriter [7]3 years ago
4 0

Answer:

<u>Each of the 4 sectors have an area:</u>

  • πR²/8 - πr²/8, where
  • R = 28/2 - 2 = 12 in
  • r = 6/2 = 3 in

<u>Find the area:</u>

  • A = π/8(12² - 3² ≈ 53 in²

<u>Outer perimeter of the frame:</u>

  • P = d + πd/2 =28( 1 + π/2) ≈ 72 in
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A boat rental charges a flat fee of $45 and $4 per hour. Which expression represents the total cost to rent a boat for h hours
vichka [17]

Answer:

45h+ 4

Step-by-step explanation:

you got to divide but the expression is 45h+4

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24% of what number is 12?
vladimir1956 [14]
To get that, you have to multiply the both numbers, which is 24*12=288
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Answer:

x=141

Step-by-step explanation:

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The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.
mote1985 [20]

The confidence interval for the mean usage of water is (18.7,20.5).

Given population standard deviation of 2.4, mean of 19.5 gallons per day and confidence interval of 98%.

We have to find the confidence interval for the mean usage of water.

To find out the confidence interval we have to first find margin of error.

μ=19.5

σ=2.4

α=0.98

α/2=0.49

We have to find the z value for the p value 0.49 which is z=2.33

Margin of error=z*μ/\sqrt{n}

=2.33*19.5/\sqrt{3034}

=0.82

lower level=mean -m

=19.5-0.82

=18.68

after rounding upto 1 decimal

=18.7

upper mean = mean+m

=19.5+0.82

=20.52

Hence the confidence interval for the usage of water is (18.7,20.52).

Learn more about margin of error at brainly.com/question/10218601

#SPJ4

7 0
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