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4 years ago

SOMEONE HELPPPPPPPPP!!!!!!

Mathematics

2 answers:

Finger [1]4 years ago

6 0

Answer:

104 yd^2.

Step-by-step explanation:

Area of the 2 circles = 2 * π r^2

= 2 * π * 4^2

= 32 π yd^2.

Area of the side of the cylinder = 2 π r h

= 2 π * 4 * 9

= 72 π yd^2.

Total surface area = 32 + 72

= 104 yd^2.

Flura [38]4 years ago

4 0

Mæs Jäk Fülëjk deens sa Bap

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Answer:

The tax on property assessed at $660,000 is $13860 .

Step-by-step explanation:

Given:

In Atlanta the tax on a property assessed at $930,000 is $19,530.

The tax rates are proportional to this city.

Now, to find the tax on a property assessed at $660,000.

So, we need to get the tax rate of Atlanta first.

Tax Rate = Tax / Property assessed × 100.

$Tax\ rate=\frac{19530}{930000} \times 100$

$Tax\ rate=0.021 \times 100$

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According to question the tax rates are proportional.

So, for getting the tax in this city we use the same rate of Atlanta:

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3 years ago

At certain time of day , a 30 meter high building cast a shadow that is 31 meters long . what is the angle of the elevation of t

Nimfa-mama [501]

Answer:

Option C. 44 degree

Step-by-step explanation:

Let

A-----> the angle of the elevation of the sun

we know that

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3 years ago

Find the area of the region that lies under the parabola y=5x - x^2, where 1≤x≤4. I would definitely like to see some work :)

Elena L [17]

Answer:

16.5 square units

Step-by-step explanation:

You are expected to integrate the function between x=1 and x=4:

$\displaystyle\text{area}=\int_1^4{(5x-x^2)}\,dx=\left.\left(\dfrac{5}{2}x^2-\dfrac{1}{3}x^3\right)\right|_{x=1}^{x=4}\\\\=\dfrac{5(4^2-1^2)}{2}-\dfrac{4^3-1^3}{3}=37.5-21=\boxed{16.5}$

Additional comment

If you're aware that the area inside a (symmetrical) parabola is 2/3 of the area of the enclosing rectangle, you can compute the desired area as follows.

The parabolic curve is 4-1 = 3 units wide between x=1 and x=4. It extends upward 2.25 units from y=4 to y=6.25, so the enclosing rectangle is 3×2.25 = 6.75 square units. 2/3 of that area is (2/3)(6.75) = 4.5 square units.

This region sits on top of a rectangle 3 units wide and 4 units high, so the total area under the parabolic curve is ...

area = 4.5 +3×4 = 16.5 . . . square units

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