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3 years ago

What is the surface area of a cone with a radius of 5 and a height of 21 in terms of pi PLZ HELP

Mathematics

1 answer:

klio [65]3 years ago

3 0

Answer:

the surface area is around 417.63

Step-by-step explanation:

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Can someone please answer these 2 questions.

Volgvan

Answer:

The cross section of sphere is circle

Area of cross section = 25 in²

Step-by-step explanation:

From the figure we can see a cylinder with height 8 inches and volume 200 π in³.

<u>The cross section of the cylinder looks like a circle.</u>

<u>To find the area of cross section</u>

Volume of cylinder = Cross section area * Height

200 = cross section area * 8

cross section area = 200/8

= 25 in²

Area of cross section = 25 in²

7 0

3 years ago

you are traveling to an island that is accesible only by boat. you plan to take one boat there and a different boat back. You'll

weqwewe [10]

$\text{Answer: }\text{Distance traveled by steamboat}=20\text{ knots}\\\text{Distance traveled by yacht }=20+20=40\text{ knots}$

Step-by-step explanation:

Since we have given that

Time taken by steamboat makes the trip=5 hours

Time taken by yacht makes the trip =2.5 hours

Since we have also given that

the yacht is 20 knots faster than the steamboat,

So let the speed of steamboat be x

Let the speed of yacht be x+20

Now, we have given that both boats will travel the same distance ,

So,

$\text{Distance traveled by steamboat}=\text{ Distance traveled by yacht}\\\\x\times 5=(x+20)\times 2.5\\\\5x=2.5x+50\\\\5x-2.5x=50\\\\2.5x=50\\\\x=\frac{50}{2.5}\\\\x=20\text{ knots}$

Hence,

$\text{Distance traveled by steamboat}=20\text{ knots}\\\text{Distance traveled by yacht }=20+20=40\text{ knots}$

7 0

2 years ago

The points (-2 11) and (6 3) lie on the same line. What is the x-intercept of the line.

ololo11 [35]

The x-intercept is (11.43,0) I don’t know how to explain it to you

7 0

2 years ago

Convert from radians to degrees

Natali [406]

Answer:

The answer is

Step-by-step explanation:

In order to convert a value from radians to degrees we multiply the value by $\frac{180}{\pi}$

So from the question the value to be converted into degrees is

<u>Converting into degrees we have</u>

<h3> $\frac{3\pi}{4} \times \frac{180}{\pi}$ </h3>

<u>Reduce the expression with π</u>

That's

<h3> $\frac{3 \times 180}{ 4} = \frac{540}{4}$ </h3>

We have the final answer as

Hope this helps you

5 0

3 years ago

I need help with this <br>7f + 2f - 3b + b<br><br>I can't figure it out

Leni [432]

Answer:

9f-4b

Step-by-step explanation:

you add the two fs together and you add the two bs together to get the answer

5 0

3 years ago