3 years ago

Find the area of a circle with a radius of 8\color{purple}{8}8start color purple, 8, end color purple.

Mathematics

1 answer:

jeka943 years ago

8 0

To find an area we use this equation:

a = r² · π
a = 8² · π
a = 64π

The answer is 64π

Hope this helps!! :)

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Identify the ellipses, represented by equations, whose eccentricities are less than 0.5

ozzi

Answer:

See explanation

Step-by-step explanation:

Hello, we cannot see the ellipse equations.

The eccentric of an ellipse is given by:

$e = \frac{c}{a}$

Assuming the equations are:

$\frac{ {x}^{2} }{25} + \frac{ {y}^{2} }{16} = 1$

Then a²=25 and b²=16

${c}^{2} = {a}^{2} - {b}^{2}$

${c}^{2} = 25 - 16$

${c}^{2} = {3}^{2}$

$c = 3$

The eccentricity is:

$e = \frac{3}{5} = 0.6$

If the ellipse has equation,

$\frac{ {x}^{2} }{ {5}^{2} } + \frac{ {y}^{2} }{ {3}^{2} } = 1$

then the this time, we have a=5 and b=3.

This means that:

${c}^{2} = {a}^{2} - {b}^{2}$

${c}^{2} = {5}^{2} - {3}^{2}$

${c}^{2} = {4}^{2}$

$c = 4$

$c = \frac{4}{5} = 0.8$

3 0

3 years ago

Read 2 more answers

Alim buys 2 T-shirt for $ 9.50 each, a 3 pack of socks for $ 7.95, and a pair of shoes for $ 49.95 . The sales tax is $6 percent

worty [1.4K]

Answer:

$81.51

Step-by-step explanation:

9.5 x 2 = 19

19 + 7.95 + 49.95 = 76.9

76.9 x 6% = 4.61

76.9 + 4.61

4 0

3 years ago

What is the decimal for 7/11

kherson [118]

Answer:

.6363 repeating

Step-by-step explanation:

5 0

3 years ago

Kareem made $273 for 13 hours of work. at the same rate, how many hours would he have to make to work to make $147?

klio [65]

Answer:

105

Step-by-step explanation:

273/13 × 5= 105

That's the correct answer

5 0

2 years ago

Help please thankssss

Bad White [126]

The answer to your question is r=6

8 0

1 year ago