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3 years ago

A circle has a diameter of 3.8n cm. what is the area of the circle?

Mathematics

1 answer:

Rashid [163]3 years ago

6 0

Answer:

11.34 cm

Step-by-step explanation:

A=1

4πd2=1

4·π·3.82≈11.34115 cm

rounded to the nearest tenth its 11.34 cm.

hoped this helped.

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How do you solve for sides a and b of a triangle when you know the value of c?

sasho [114]

Assuming you have some angle measures, you could use the Law of Sines to solve for the missing side lengths, which states that,
$\frac{a}{sinA}= \frac{b}{sinB}= \frac{c}{sinC}$ ,
where a, b, and c correspond to the given sides you have, and A, B, and C represent the angles you have.

In this scenario, you would have to have the values for c (which we do), and have the angle measure of C. In addition, we would also need an angle measure that is either A or B.

Hope this helps a bit!

:)

7 0

3 years ago

Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.118.11 and a standard deviation of 1.

shutvik [7]

Answer:

2.5% of American women have shoe sizes that are at least 11.03.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 8.11

Standard deviation = 1.46

Using the empirical rule, what percentage of American women have shoe sizes that are at least 11.03?

11.03 = 8.11 + 2*1.46

So 11.03 is two standard deviations above the mean.

The empirical rule states that 95% of the measures are within 2 standard deviation of the mean. Since the distribution is symetric, of those 5% farther than two standard deviations of the mean, 2.5% are higher than 2 standard deviations above the mean and 2.5% are lower than 2 standard deviations below the mean.

So 2.5% of American women have shoe sizes that are at least 11.03.

8 0

3 years ago

Consider the rectangle.

Gnoma [55]

Answer:

Step-by-step explanation:

a. The area of a rectangle is width * length. The width is 5x, and the length is 7x-2. This means the area is 5x*(7x-2). Distributing the 5x, we find that the area of the rectangle is 35x^2-10x.

b. To find the area when x is 4, we plug x=4, so 35*4^2-10*4=560-40=520.

c. same as above, we plug x=7, and get 1645 as our area.

4 0

3 years ago

What is that in scientific notation.

ASHA 777 [7]

The answer is 3.5 x 10^ -2. you have to use distribution

3 0

3 years ago

Read 2 more answers

ANYONEEE KNOW THE ANSWER ?? (Don’t answer if you don’t) <333

Contact [7]

Answer:

larger number is -5 and smaller one is -1

Step-by-step explanation:

x+y = -6

x = -6-y ....eqn i

x-y = -4...eqn ii

substituting eqn i in ii

x - y = -4

or, - 6 - y - y = -4

or, -6 - 2y = -4

or, - 2y = 2

so, y = -1

x + y = -6

x + (-1) = -6

so, x = -5

4 0

2 years ago