1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Molodets [167]
3 years ago
8

A circular pool with a diameter of 18 ft will have a uniform 4 ft concrete walkway poured around it. If the concrete cost $4.25

a square foot, how much will it cost for the concrete?
A. $1,714.07
B. $1,247.08
C. $276.40
D. $1,174.70
Mathematics
2 answers:
zysi [14]3 years ago
4 0

A circular pool with a diameter of 18 ft will have a uniform 4 ft concrete walkway poured around it. If the concrete cost $4.25 a square foot, how much will it cost for the concrete?

This can be solve be solving the area of walkway

Area of walkway is equal to = (pi)( 9 ft +4) ^2– (pi)(9ft)^2

= 276.46 sq ft

Cost = 276.46 sq ft * ($4.25 a square foot) = $1174.70

svp [43]3 years ago
4 0

Answer:

$1,174.70

Step-by-step explanation:

Given : A circular pool with a diameter of 18 ft will have a uniform 4 ft concrete walkway poured around it.

To Find: If the concrete cost $4.25 a square foot, how much will it cost for the concrete?

Solution:

A circular pool has  diameter of 18 ft will have a uniform 4 ft concrete walkway   around it.

So radius = diameter /2 =18/2 =9 feet

Thus Area of circular pool = \pi r^{2} = \pi 9^{2}

Use π =3.14

  Thus Area of circular pool =  3.14*9^{2}

                                             =  3.14*81

                                             =  254 . 37 square feet

Since the Radius of the pool with concrete = 9 + 4= 13

So, Area of circular pool with concrete=   3.14*13^{2}

                                             =  3.14*169

                                             =  530.66 square feet

Now surface area of concrete = area of pool with concrete - area of pool

Surface area of concrete= 530.66 - 254.34 = 276.32 square feet

If the concrete cost $4.25 a square foot of surface area,

So the cost for the concrete of  276.32 square feet  =  276.32 * 4.25 = $ 1174.36

The option close to our answer is $1,174.70

Thus Option D is correct

You might be interested in
In september, seattle's daily high temperature has a mean of 70 °f and a standard deviation of 7 °f. What are the mean, standard
Anna [14]
Mean= is the summation of the maximum temperatures ÷ the numbers of times the temperatures where recorded

standard deviation= is a number used to tell how measurements for a group are spread out from the average (mean), or expected value.

A low standard deviation means that most of the numbers are very close to the average.

A high standard deviation means that the numbers are spread out.

Variance= is a way to measure how far a set of numbers is spread out.

A variance of zero indicates that all of the data values are identical. All non-zero variances are positive.

A small variance indicates that the data points tend to be very close to the mean, and to each other.

A high variance indicates that the data points are very spread out from the mean, and from one another.
8 0
3 years ago
4) y=-4x-1<br> Finding slope
Lisa [10]

Answer:

4/1

Step-by-step explanation:

this is because it is 4x

6 0
3 years ago
Read 2 more answers
The temperature in a city was recorded over a ten-hour period. The graph below shows the relationship between the temperature an
harkovskaia [24]

Answer:

A

Step-by-step explanation:

From the graph, we can see that the <em>temperature increased initially</em>, then <em>started to decrease</em>. <u>All of these NOT in a constant rate, though</u>.

Roughly, the temperature was increasing from start till around 5.5 hours. Then on the temperature decreased.

So we can eliminate B, C, and D. That leaves us with correct answer as A.

5 0
3 years ago
55.8 is 62% of what number?
zhenek [66]
90

55.8 /? = 62/100
55.8 x 100= 62 x ?
5580=62 x ?
5580/62 = ?
?=90
7 0
3 years ago
After dis if you get the answer right you get 50 points
svetoff [14.1K]

Answer:

5

Step-by-step explanation:

First you have 24-(5+9)/2

So do 5+9=14

24-14=10

10/2=5

answer is 5

7 0
2 years ago
Read 2 more answers
Other questions:
  • Simplify: <br><br> A. 12x<br> B. 8√ 6x <br> C. 8x2√ 6 <br> D. 2x2√ 2
    15·2 answers
  • What is the approximate volume of the cone with a height of 9 cm and a radius of 15 cm.
    7·1 answer
  • The two figures above are similar. The perimeter of quadrilateral ABCD is 50 cm, and the perimeter of quadrilateral EFGH is 75 c
    6·2 answers
  • Jared owed his brother
    8·1 answer
  • Sampling may be defined as which of the following?A) Selection of an accessible population for a studyB) Selection of a subset o
    12·1 answer
  • The diagram shows three points P, Q and R on horizontal ground.
    11·1 answer
  • Complete each congruence statement by naming the corresponding angle or side.
    12·1 answer
  • Algebra 1 - One question, I'm not sure how to solve and it's worth 4 marks. That means there are 4 things I must include in my a
    8·1 answer
  • Someone help dont scam or you get reported
    15·2 answers
  • Which expressions are equivalent to - f - 502f - 3)?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!