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docker41 [41]
2 years ago
8

Find the total surface area of the following cone. Leave your answer in terms of Pi. 4cm 3cm

Mathematics
1 answer:
castortr0y [4]2 years ago
5 0

The triangle formed from the height of the cone and the radius of its base is a special 3,4,5 triangle. The slant height is 5cm.

Recall that the area of a circle = pi*r^2

Substitute 3 in for r

Area = pi * (3)^2 = 9pi

SA = pi*r*l + B

Substitute our values into the equation

SA = pi * 3 * 5 + 9pi

SA = 15pi + 9pi

SA = 24pi cm^2

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Write equivalent fractions for 1 2/3 and 1 7/8 using 24 as the common denominator 2 24 7 1 0​
NARA [144]

<u>Answer:</u>

<u />

2×8=16

7×3=21

2/3 + 7/8 = 16/24 + 21/24

7 0
3 years ago
I need help finding y
denpristay [2]

Answer:

y = 9.8995

Step-by-step explanation:

This question requires the use of basic trigonometry.

In this problem, we know one of the sides and two of the angles.

Since one of the angles is 45 degrees and the sum of all internal angles of a triangle is 180 degrees, the other angle can only be 45 degrees, making this an isosceles triangle - that is, the length of the other leg, x, is also 7.

You could use the soh cah toa mnemonic to figure it out, but here just using the a^2 + b^2 = c^2 should be sufficient since we know both legs of the triangle.

7^2 + 7^2 = 98, and the square root of 98 gives you about 9.8995, which sounds about right for this situation.

Hope this helped!

4 0
3 years ago
A 24,000-gallon pool is being filled at a rate of 50 gallons per minute. At this rate, how many minutes will it take to fill thi
ser-zykov [4K]

Answer:

192 minutes

Step-by-step explanation:

24,000 times .4 = 9600

9600 / 50 = 192

4 0
2 years ago
Use the zero product property to find the solutions to the equation x^2+x-30=12
lukranit [14]

Answer:

Due to there being no negatives in this equation, you can pretty much just eliminate the first 3 answers.


However in working out, here is what I did.

x^2 + x - 30 = 12 (+30) 

= x^2 + x = 42


Then you can conclude that the answer is D, due to 6 x 6 = 36, plus 7 equaling 42. 





8 0
3 years ago
Solve for missing angle.Justify and explain your calculations
myrzilka [38]
The missing angle would be 68 because the the triangles can be alternate exterior
3 0
3 years ago
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