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3 years ago

13

What is the exact volume of a cone with a radius of 9 cm and height of 6 cm?

2 answers:

Brut [27]3 years ago

8 0

Answer: 508.94 cm

Step-by-step explanation: V=πr^{2}(h/3) or V=π9^{2}(6/3)

6/3 = 2

9^{2} = 81

π81 = 254.47

81 * 254.47 = 508.94

andreyandreev [35.5K]3 years ago

7 0

V≈508.94cm³ would be chur answer

i luv chur pfp by the way

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antiseptic1488 [7]

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2 years ago

If you place the north pole of a magnet near the north pole of another magnet, what do you except to happen

slavikrds [6]

They will repel each other

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3 years ago

Read 2 more answers

I need help and can you explain how you got the answer because I don’t understand how to do this..

Bond [772]

Answer:

9 cm

Step-by-step explanation:

The formula to calculate the area of a triangle is: A = bXh square units.

Therefore simply divide the area given 54 cm over base 6 cm to get the height. 54÷ 6 = 9

Hope this suffices.

6 0

2 years ago

5cosx -2sin(x/2) +7=0<br>Help me to find x step by step<br>pls

miskamm [114]

Answer:

x = 180

Step-by-step explanation:

First, you need to know

1. Double-angle formula:

cos(2x) = $cos^{2}x - sin^{2}x$

2. Pythagorean identity:

$cos^{2}x + sin^{2}x = 1$

Back to your problem, replacing the variable by the above:

$5cosx-sin\frac{x}{2}+7 = 0$

$5(cos^{2}\frac{x}{2}-sin^{2}\frac{x}{2}) - 2sin\frac{x}{2} + 7 = 0$ By Double-angle formula

$5(1 - 2sin^{2}\frac{x}{2}) - 2sin\frac{x}{2} + 7 = 0$ By Pythagorean identity

Given $y = \frac{x}{2}$

$5(1-2sin^{2}y) - 2siny + 7 = 0$

$10sin^{2}y+2siny-12=0$

$5sin^{2}y+siny-6=0$

$(5siny + 6)(siny - 1)=0$ , we know -1 < sinx < 1, for every x ∈ R

$siny = 1, y =90$

$y = \frac{x}{2}$

$x = 180$

8 0

3 years ago

An employee compiled sales data for a company once each month. The scatter plot below shows the sales (in multiples of $1000) fo

svp [43]

Answer:

940

Step-by-step explanation:

The scatter plot below shows the sales (in multiples of $1000) for the company over time (in months).

Also the sales can be modeled by the help of a linear function as:

y = 0.94x + 12.5.

Now we know that the company's sales increase per month is the slope of the linear function by which this situation is modeled.

We know that for any linear function of the type:

y=mx+c

'm' represents the slope and 'c' represents the y-intercept of the line.

Hence, by looking at the equation we get:

m=0.94

but as the sales are multiplied by 1000.

Hence,

0.94×1000=$ 940.

Hence, the company's sales increase per month is:

$ 940

5 0

2 years ago