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diamong [38]
3 years ago
5

What about this one a tennis ball has a radius of 1.25 inches. The outside of a tennis ball is covered with felt. How many squar

e inches of felt, to the nearest square inch, does it take to cover a tennis ball?
Mathematics
2 answers:
inessss [21]3 years ago
3 0
The surface area of a sphere is given by the formula
.. A = 4π*r^2
.. A = 4π*(1.25 in)^2 ≈ 20 in^2
Maslowich3 years ago
3 0

It takes approximately 20 square inches of felt to cover a tennis ball.

Explanation

A tennis ball is in shape of a Sphere. As the outside of the ball is covered with felt, so we need to find the surface area of the ball.

Formula for surface area of sphere: A= 4\pi r^2

where, r is the radius of the sphere.

Here the radius is given as 1.25 inch, so r=1.25

Thus,

A= 4\pi (1.25)^2\\ \\ A= 4(3.14)(1.5625)\\ \\ A= 19.625\\ \\ A= 20 (Approximately)

So, it takes approximately 20 square inches of felt to cover a tennis ball.

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Can I please have some help !
maw [93]

Answer:

No because when you set it up it would be 11/9.4 which equals 1.17

Then you do the other side, 10/8.4 which equals 1.19

And 1.17 doesn't equal 1.19 so they are not similar


7 0
3 years ago
1. D=5.9 ft.
Shtirlitz [24]

\qquad\qquad\huge\underline{{\sf Answer}}♨

Here's the solution ~

As we know, we can calculate the circumference of a circle in terms of its diameter as :

\qquad \sf  \dashrightarrow \:c =  \pi d

where, c = circumference and d = diameter

And also, circumference of circle is terms of radius (r) is :

\qquad \sf  \dashrightarrow \:c =  2\pi r

Now, let's move on to questions ~

<h3>First </h3>

\qquad \sf  \dashrightarrow \:3.14 \times 5.9

\qquad \sf  \dashrightarrow \: \approx18.53 \: ft

<h3 />

・ .━━━━━━━†━━━━━━━━━.・

<h3>Second</h3><h3 /><h3 /><h3 /><h3>\qquad \sf  \dashrightarrow \:3.14 \times 3.2</h3>

\qquad \sf  \dashrightarrow \: \approx10.048 \: ft

・ .━━━━━━━†━━━━━━━━━.・

<h3>Third</h3>

\qquad \sf  \dashrightarrow \:3.14 \times 6.1

\qquad \sf  \dashrightarrow \: \approx19.15 \: ft

・ .━━━━━━━†━━━━━━━━━.・

<h3>Fourth</h3>

\qquad \sf  \dashrightarrow \:2×3.14 \times  3.7

\qquad \sf  \dashrightarrow \: \approx2×11.62  \: m

\qquad \sf  \dashrightarrow \: \approx23.24  \: m

・ .━━━━━━━†━━━━━━━━━.・

<h3>Fifth </h3>

\qquad \sf  \dashrightarrow \:2×3.14 \times  6.2

\qquad \sf  \dashrightarrow \: \approx2× 19.47 \: units

\qquad \sf  \dashrightarrow \: \approx38.94  \: m

・ .━━━━━━━†━━━━━━━━━.・

<h3>Sixth</h3>

\qquad \sf  \dashrightarrow \:2×3.14 \times  5.1

\qquad \sf  \dashrightarrow \: \approx2×16.01 \: ft

\qquad \sf  \dashrightarrow \: \approx \: 32.02m

➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖

7 0
2 years ago
What is negative 5 and 3/4 as a fraction
Alinara [238K]

Answer:

-23/4

Step-by-step explanation:

-5\frac{3}{5}

-\frac{5x4+3}{4}

-\frac{20+3}{4}

-\frac{23}{4}

3 0
3 years ago
Need help please need help
klasskru [66]

Answer:

b.y=4

c. x=6

These are the answers hope this helps

7 0
2 years ago
A local carpet company has been hired to carpet a planetarium which is in the shape of a circle. If the radius of the planetariu
lapo4ka [179]
This is the concept of application of geometry and financial mathematics; To calculate for the total cost of the carpet we proceed as follows;
Total cost=[area of the carpet]*[price per square yard]
area of carpet is given by:
Area=πr^2
where;
radius,r=6 yeards
=π*6^2
=113.1 square yards
therefore the price of the carpet will be:
113.1*14
=$1,583.4
5 0
3 years ago
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