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2 years ago

Karen is recording the percentages she earned on each quiz in her math class. Here are her results for the last 7 quizzes.

Mathematics

2 answers:

tresset_1 [31]2 years ago

8 0

87.57

If I'm remembering correctly, range is the sum of the numbers divided by how many numbers there are.

79+91+76+87+93+79+94=599

599/7= 87.571

Round your answer to the nearest tenth

87.57

Hope this helps

matrenka [14]2 years ago

6 0

85.8571. add all of the numbers together , then divide by how many numbers there are.

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Which expression shows 0.95 in expanded form?

raketka [301]

In standard form,it should be 0 +0.9 +0.05

4 0

2 years ago

Given: ∆ABC, m∠C = 90° CB = 8, m∠B = 38º Find the area of a circumscribed circle. Find the area of the inscribed circle.

vitfil [10]

Answer:

Circumscribed circle: Around 80.95

Inscribed circle: Around 3.298

Step-by-step explanation:

Since C is a right angle, when the circle is circumscribed it will be an inscribed angle with a corresponding arc length of 2*90=180 degrees. This means that AB is the diameter of the circle. Since the cosine of an angle in a right triangle is equivalent to the length of the adjacent side divided by the length of the hypotenuse:

$\cos 38= \dfrac{8}{AB} \\\\\\AB=\dfrac{8}{\cos 38}\approx 10.152$

To find the area of the circumscribed circle:

$r=\dfrac{AB}{2}\approx 5.076 \\\\\\A=\pi r^2\approx 80.95$

To find the area of the inscribed circle, you need the length of AC, which you can find with the Pythagorean Theorem:

$AC=\sqrt{10.152^2-8^2}\approx 6.25$

The area of the triangle is:

$A=\dfrac{bh}{2}=\dfrac{8\cdot 6.25}{2}=25$

The semiperimeter of the triangle is:

$\dfrac{10.152+6.25+8}{2}\approx 24.4$

The radius of the circle is therefore $\dfrac{25}{24.4}\approx 1.025$

The area of the inscribed circle then is $\pi\cdot (1.025)^2\approx 3.298$ .

Hope this helps!

6 0

3 years ago

Find the missing length round to the nearest tenth I don’t know how to do this

FromTheMoon [43]

Answer:

Step-by-step explanation:

6 0

2 years ago

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21) Answer the question using the information given. Special cube-shaped dice are manufactured having side lengths of in. The di

Elenna [48]

Answer: Hello your question is missing some details but I will provide a general solution based on the scope of the problem and you can plugin the missing value

answer = Volume of rectangular prism box / volume of cube

Step-by-step explanation:

To determine the number of Dice that will fit in the rectangular prism box

First : calculate the volume of the cube box ( dice )

volume of a Cube box : V = L^3 where L = side length

next : calculate the volume of the rectangular prism box

volume of rectangular prism box = L * b * h

L= length , b = width , h = height

final step : Divide the volume of the rectangular prism box by the volume of the cube box ( dice )

= ( L * b * h ) / ( L^3 )

7 0

3 years ago

What fraction is 1 yard 2 feet and 6 inches

MA_775_DIABLO [31]

Answer:

Make sure you convert these numbers into one unit. Convert everything to yard. Just convert the feet and inches in yard since it's the biggest unit, and then add them together. You should get a fraction not a whole number.

3 0

3 years ago

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