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3 years ago

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Perimeter and circumference 9-1

1 answer:

PolarNik [594]3 years ago

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The area of a circle is 77.28m2.<br> Find the length of the diameter rounded to 1 DP.

allochka39001 [22]

Answer:diameter=9.92m

Step-by-step explanation:

Area=77.28

π=3.14

Area=π x (d/2)^2

77.28=3.14 x (d/2)^2

Divide both sides by 3.14

77.28/3.14=(3.14x(d/2)^2)/3.14

24.6=(d/2)^2

Take them square root of both sides we get

d/2=√(24.6)

d/2=4.96

d=4.96 x 2

d=9.92

4 0

2 years ago

Henrietta solved a rational equation. Her work is shown. How could she solve it in a simpler way?

RoseWind [281]

Henrietta solved a rational equation by multiplying both sides by $3x^{2}(x+2)$ .She did not find the least common multiple of the denominators .If she had find the least common denominator which is 3x(x+2) then the question can have been simplified in more simpler form.

Henrietta can have got rid of denominator and then use the distributive rule .

So the first option

A:She could use the least common multiple of the denominator is right

4 0

2 years ago

Determine whether the improper integral converges or diverges, and find the value of each that converges.

shusha [124]

Answer:convergent

Step-by-step explanation:

Given

Improper Integral I is given as

$I=\int_{-\infty}^{0}1000e^xdx$

$I=1000=\int_{-\infty}^{0}e^xdx$

integration of $e^x$ is $e^x$

$I=1000\times \left [ e^x\right ]^{0}_{-\infty}$

$I=1000\times I=\left [ e^0-e^{-\infty}\right ]$

$I=1000\times \left [ e^0-\frac{1}{e^{\infty}}\right ]$

$I=1000\times 1=1000$

so the integration converges to 1000 units

6 0

3 years ago

Tony is taking inventory in a warehouse. He's counting tennis shoes. There are 43 pairs of women's tennis shoes and 39 pairs of

n200080 [17]

There would be 82 pairs of shoes in all

5 0

3 years ago

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How many radians is 288 degrees?

Oksi-84 [34.3K]

Answer:

5.02655

Step-by-step explanation:

7 0

3 years ago

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