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Serggg [28]
2 years ago
7

SOMEONE PLEASE HELP!

Mathematics
1 answer:
Andrews [41]2 years ago
7 0

Answer:

17.2°

Explanations

To find angle A, use the cosine rule.

a^2 = b^2 + c^2 - 2 × a × c cos A

4^2 = 7^2 + 10^2 - 2 × 7 × 10 cos A

16 = 49+ 100 - 140 × cosA

16 = 149 - 140cosA

16- 149 = - 140cosA

-133 = - 140cosA

cosA = 133/140

cosA = 0.95

A = 17.2°

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Juliette [100K]

Area of the circle is the area covered by that circle. The area of the circle whose circumference is 7π m is 12.25π m².

<h3>What is the area of a circle?</h3>

The area of the circle is the area covered by that circle. It is given by the formula,

\text{Area of the circle}=\pi r^2

where r is the radius of the circle.

As it is given that the circumference of a circle is 7π m. Therefore, the radius of the circle can be written as,

\text{Circumference of the circle} = 2\pi r

7 \pi = 2 \pi r\\\\r = 3.5\rm\ m

Now, we know the formula of the area of a circle, therefore, the area of the circle can be written as,

\text{Area of the circle}=\pi r^2

                           = \pi \times (3.5)^2\\\\= 12.25\pi\rm \ m

Hence, the area of the circle whose circumference is 7π m is 12.25π m².

Learn more about Area of Circle:

brainly.com/question/1238286

5 0
3 years ago
What is divide 4860 in the ratio 5:4:3
NNADVOKAT [17]
Total portions are
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One portion,
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8 0
3 years ago
Point Q is the centroid of △ABC. QF = _____<br><br> A. 10<br> B. 5<br> C. 15<br> D. 9
Keith_Richards [23]

Answer: QF = 5

Step-by-step explanation:

We know that if a triangle has a centroid, the ratio of the longer segment to shorter segment is 2:1. We can set up a proportion \frac{2}{1} = \frac{10}{x}, where x is the length of QF. By cross multiplying and dividing, you get x = 5 or QF = 5.

6 0
3 years ago
HELP !!! | 20 Points.
RUDIKE [14]

Answer:

No. The ladder is too steep.

Step-by-step explanation:

Length of ladder = 17 feet.  This is the hypotenuse.

Side a of a right triangle = 16.6

To answer this, you need one of the trigonometric functions.  

Opposite = 16.5

hypotenuse = 17

The function you need is the sine function.

Sin(theta) = opposite / hypotenuse

sin(theta) = 16.5 / 17

Sin(theta) = 0.97059

theta = sin-1(0.07059)

theta = 76.07

No the ladder is too steep.

5 0
3 years ago
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professor190 [17]
3/5 + 1/5 = 4/5 are either solid or cat eyes
4 0
3 years ago
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