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3 years ago

What is the circumference of a circular swimming pool with a diameter of 6 ½ feet? (use 22 over 7 as pi)

Mathematics

1 answer:

trapecia [35]3 years ago

5 0

Answer:

10.21 feet.

Step-by-step explanation:

circumference of circle with diameter d is given by $\pi d$

where r is the radius of the circle.

_____________________________

given

diameter = 6 1/2 = 13/2 feet

\thus, circumference of circle is calculated as following

$circumference = \pi *13/2 = 22/7 * 13/2\\circumference = 11*13/7*2 = 143/14 = 10.21$

Thus, circumference of given circle is 10.21 feet.

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Sarah brought her City car in for repairs and maintenance over the first three years she owned it she replace the brake pads in

Veseljchak [2.6K]

Answer: Average per year for the repairs and maintenance is $273.66

Step-by-step explanation:

She replace the brake pads in the third year for $98 and the preventive maintenance plan cost $723

what did he average per year for repairs and maintenance?

The total cost of repairs and maintenance = 98 + 723 = 821

repairs and maintenance over the first three years

Divide the answer by 3

821/ 3 = 273.67 dollars per year

3 0

3 years ago

The circumference of a circle is 19π m. What is the area, in square meters? Express your answer in terms of \piπ.

lianna [129]

Answer:

90.25π

Step-by-step explanation:

The circumference of circle is 2πr, or in other words the diameter times π.

The area of a circle is πr^2.

19π is the circumference of this circle.

So, 19 is the diameter, and 9.5 the radius.

The area if (9.5^2)π.

9.5^2=90.25

So, in terms of π, the area of the circle is 90.25π.

7 0

3 years ago

Find the surface area of a rectangular prism measuring<br> 5 m by 8 m by 9 m.

olganol [36]

The formula of the surface area of the rectangular prism is equal:
$A=2(wl+wh+lh)$
where:
l - length
w - width
h - height
We have:
l = 5m
w = 8m
h = 9m
Substitute:
$A=2\cdot(5\cdot8+5\cdot9+8\cdot9)=2\cdot(40+45+72)=2\cdot157=314\ m^2$

3 0

3 years ago

At an assembly 7 out of the first 10 students who entered the gym we're carrying a backpack. Based on this on formation if 700 s

Romashka [77]

Answer:

490 students have back packs

Step-by-step explanation:

700 / 10 = 70

70* 7 = 490

6 0

3 years ago

Read 2 more answers

A ball is released at a height of 8 inches to roll inside a half-cylinder it rolls to a height of 2 inches on the other side of

yuradex [85]

Answer:

C) 1/8 inch

Step-by-step explanation:

We are given the explicit formula

$a_n=2(\frac{1}{4})^{n-1}$ , where n is the term number.

The third climb up would be the third term; this means we replace n with 3:

$a_3=2(\frac{1}{4})^{3-1}\\\\a_3=2(\frac{1}{4})^2=2(\frac{1}{4}\times \frac{1}{4})=2(\frac{1}{16})=\frac{2}{16}=\frac{1}{8}$

6 0

3 years ago