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4 years ago

Find the surface area of the figure below.

Mathematics

2 answers:

Eduardwww [97]4 years ago

8 0

The answer is b: 95.03 ft^2

Divide 5.5 by 2 to get the radius of 2.75.

Use 4(pi)(r)^2 to get the surface area of the sphere.

tankabanditka [31]4 years ago

8 0

Answer:

B. $\displaystyle 95,03\:ft.^2$

Step-by-step explanation:

$\displaystyle 4πr^2 = S.A. \\ \\ 4π[2,75]^2 = 4π[7,5625] = 30,25π ≈ 95,03317777... ≈ 95,03$

* The radius is half the diameter.

I am joyous to assist you anytime.

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On a number line, which number is 7/9 of the way from -6 to 3

Paha777 [63]

Answer:

Step-by-step explanation:

if you go from -6 to 3 it is 9 spaces. so 7 spaces equals one.

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4 years ago

Explain why any of the four operations placed between two terms 5 and -3 sqrt (8) will result in an irrational number

Gnoma [55]

Sum/difference:

Let

$x = 5 + (-3\sqrt{8}) = 5-3\sqrt{8}$

This means that

$3\sqrt{8} = 5-x \iff \sqrt{8} = \dfrac{5-x}{3}$

Now, assume that $x$ is rational. The sum/difference of two rational numbers is still rational (so 5-x is rational), and the division by 3 doesn't change this. So, you have that the square root of 8 equals a rational number, which is false. The mistake must have been supposing that $x$ was rational, which proves that the sum/difference of the two given terms was irrational

Multiplication/division:

The logic is actually the same: if we multiply the two terms we get

$x = -15\sqrt{8}$

if again we assume x to be rational, we have

$\sqrt{8} = -\dfrac{x}{15}$

But if x is rational, so is -x/15, and again we come to a contradiction: we have the square root of 8 on one side, which is irrational, and -x/15 on the other, which is rational. So, again, x must have been irrational. You can prove the same claim for the division in a totally similar fashion.

7 0

3 years ago

Look at the image please helppp

balu736 [363]

Answer:

Option A. one rectangle and two triangles

Option E. one triangle and one trapezoid

Step-by-step explanation:

step 1

we know that

The area of the polygon can be decomposed into one rectangle and two triangles

see the attached figure N 1