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3 years ago

Please help me with this question

Mathematics

1 answer:

sergejj [24]3 years ago

5 0

Answer:

49π

Step-by-step explanation:

Circle area: πr^2

Since A to C is 14, and they're both in the center, A to B and B to C will both be 7 as a radius.

Since we know the radius, we can put it in the formula, πr^2.

We only need to solve for one circle, since both circles are the same. By solving the circle, we will put in 7 for the radius, giving us π7^2, which is 49π.

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Vesna [10]

Answer:

Let $u=3x^2-3x$

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Step-by-step explanation:

See attached for step-by-step

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2 years ago

On February 1, 1977, John deposited $2250 into a savings account paying 5.76% interest, compounded quarterly. If he hasn't made

Travka [436]

John's effective annual rate is about
(1 +.0576/4)^4 -1 ≈ 5.8856%
According to the "rule of 72", John's money will have doubled in
72/5.8856 = 12.23 years

John's balance will be $4500 in 1989.

_____
Since you're only concerned with the year (not the month), you don't actually need to determine the effective annual rate. The given rate of 5.76% will tell you 72/5.76 = 12.5 years. The actual doubling time is closer to 12.12 years, so using the effective rate gives results that are closer, but "good enough" is good enough in this case.

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3 years ago

Which statements are true about a triangular pyramid? Check all that apply.

miss Akunina [59]

Answer:

It has exactly four faces that are triangles.

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It has 6 edges.

Step-by-step explanation:

A triangular pyramid is also termed as a tetrahedron.

The properties of a triangular pyramid include:

four triangular faces,
six edges
four vertex corners.

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The faces are of equal shape and size.

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4 0

3 years ago

Read 2 more answers

the entrance of a cave is at an elevation of 14 meters. the lowest part of the cave is at an elevation of _86 meters. write an i

Advocard [28]

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3 years ago

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Answer:

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(2) TRUE.

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Step-by-step explanation:

(1)

The between groups degrees of freedom for the study is:

$\text{df}_{B}=k-1\\=3-1\\=2$

Thus, the between groups degrees of freedom is 2.

(2)

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Hₐ: At least one of the mean is not equal.

The output of the ANOVA test is attached below.

The p-value of the test is 0.00005.

p-value = 0.00005 < α = 0.05

Thus, the result is statistically significant.

The statement is TRUE.

(3)

As the p-value of the test is less than the significance level, the researcher should make the decision to reject the null hypothesis.

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3 years ago