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iVinArrow [24]
3 years ago
9

Help please the question is on the photo.

Mathematics
1 answer:
tiny-mole [99]3 years ago
4 0

Answer:

461.8π cm³

Step-by-step explanation:

The formula for the volume of a cone is V = πr²h, where r is the radius and h is the height.  Accordingly, we get:

A = π(3.5 cm)²(12 cm), or approximately 461.8π cm³

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A rectangular window measures 54 inches by 24 inches. There is an a = 14-inch wiper blade attached by a b = 5-inch arm at the ce
nika2105 [10]
It the wiper blade (and arm) made a full rotation, 2 circles would be formed.

One small circle with radius b, and a larger circle with radius a+b.


The areas of these 2 circles are respectively:

\pi b^2=\pi\cdot 5^2=25 \pi (in^2)    and

\pi (a+b)^2=\pi (14+5)^2=361\pi (in^2)


120° is 1/3 of a complete angle 360° which form a circle, so the areas formed by the arm of length b, and the arm + the wiper blade (a+b) are:

\frac{25 \pi}{3} and \frac{361\pi}{3} in squared respectively.

the actual wiped area is \frac{361\pi}{3}-\frac{25 \pi}{3}= \frac{336\pi}{3}=112\pi \approx351.7 (in squared)


Area of the window is 54*24= 1296 (in squared)

thus, the ratio of the wiped area to the whole area of the window is 351.7/1296=0.271

Converted to percentages, this is 27.1%


Answer: 27.1%

3 0
3 years ago
-4 + (-1) on a number line
katrin2010 [14]

Answer:

-5

Step-by-step explanation:

+-=-

-4-1=-5

5 0
3 years ago
Read 2 more answers
4.1 or 4.085 greater​
oksano4ka [1.4K]

Answer:

4.1 >

Step-by-step explanation:

5 0
3 years ago
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Please Answerrr! I need help ASAPP!
MArishka [77]

80

Step-by-step explanation:

5×6 = 30 and 30×8 = 240 divide that by three you get 80

6 0
2 years ago
7.
Svetlanka [38]

Answer:

D. y ≥ 2x – 2

Step-by-step explanation:

Graph the inequality by finding the boundary line, then shading the appropriate area.

y ≥ 2 x + 2

Graph the inequality by finding the boundary line, then shading the appropriate area.

y ≥ − 2 x + 2

Graph the inequality by finding the boundary line, then shading the appropriate area.

y ≤ 2 x − 2

Graph the inequality by finding the boundary line, then shading the appropriate area.

y ≥ 2 x − 2

5 0
3 years ago
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