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Vera_Pavlovna [14]
3 years ago
10

What is the volume of the cone shown above ? If H = 2 and R= 9

Mathematics
1 answer:
Ede4ka [16]3 years ago
6 0
For this case, the first thing you should do is apply the following formula:
 V = (pi * r ^ 2 * h) / (3)
 Where,
 r: radio
 h: height
 Substituting values we have:
 V = (3.14 * (9 ^ 2) * 2) / (3)
 V = 169.56
 Rounding:
 V = 169.6 units ^ 3
 Answer:
 the volume of the cone is:
 B. 169.6 units cubed
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Find the slope between the two points given. Then, use the slope and one of the points to write the equation of the line in Slop
Anika [276]

Answer:

Equation: y=2x-1

Slope: 2

y-intercept: -1

Step-by-step explanation:

Hi there!

We are given the points (-1, -3) and (-2, -5). We need to find the slope, equation of the line, and the y intercept of the line

First, let's find the slope

The formula for the slope (m) calculated from two points is \frac{y_2-y_1}{x_2-x_1} where (x_1,y_1) and (x_2,y_2) are points

We have everything we need for the formula, but let's label the values of the points to avoid any confusion

x1=-1

y1=-3

x2=-2

y2=-5

Now substitute into the formula (remember: the formula has SUBTRACTION):

m=\frac{-5--3}{-2--1}

simplify

m=\frac{-5+3}{-2+1}

add

m=\frac{-2}{-1}

divide

m=2

So the slope is <u>2</u>

Now let's find the equation of the line

The question asks for it to be in slope-intercept form, which is y=mx+b, where m is the slope and b is the y intercept

We calculated the slope from earlier, so let's substitute that into the equation

y=2x+b

Now we need to find b

The equation will pass through both (-1, -3) and (-2, -5) so we can use either one of them to solve for b (doesn't matter which one)

Let's take (-1, -3) as an example

substitute -1 as x and -3 as y into the equation

-3=2(-1)+b

multiply

-3=-2+b

Add 2 to both sides

<u>-1=b (the value of the y intercept!) </u>

Substitute -1 as b into the equation

<u>y=2x-1</u>

We found everything needed for this problem

Hope this helps!

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vodka [1.7K]

Answer:

A

Step-by-step explanation:

9 = (1/27)^(a+3)

3² = (3^-3)^(a+3)

3² = 3^(-3a-9)

2 = -3a-9

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Please solve it I will give you 30 points
Aloiza [94]

Answer:

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Step-by-step explanation:

expanding (2x^2-1)^2. multiplying (x-2) (1-2x)

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= -2x^2+5x-2

(4x^2-4x+1-2x^2+5x-2)

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Steps to solve:

25 = x + 19

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