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Rasek [7]
3 years ago
6

A cone and a cylinder have congruent height and base bases. The volume of the cone is 18m squared. What's the volume of the cyli

nder?
Mathematics
1 answer:
zzz [600]3 years ago
8 0
Short answer 3 times as much = 54 m^3 <<<<< answer

The volumes are krelated by k So solve for k

Volume of Cylinder = k Volume of the cone.
pi r^2 h = k(1/3 pi r^2 h)  Since you know that r is the same in both and so is h they divide out.
divide by h
pi r^2  = k (1/3 pi r^2 Divide by pi
r^2 = k (1/3 r^2 ) Divide by r^2
1 = k (1/3) multiply by 3
3 = k

The volume will be 3 times as much.as the cone.
3 * 18 = volume of cylinder.
54 <<<< volume of cylinder.


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Determine whether each function is even, odd, or neither.
Ede4ka [16]

Answer:

a)  f(x) = x² -9

function is an even function

b)  g(x) = |x -3|

function is an even function

c) f(x)= x / x²-1

function is  odd function

d) g(x) = x + x²

Given function is not an even not odd function

This function is neither even or odd

Step-by-step explanation:

<u><em>Explanation</em></u>:-

a) Given f(x) = x² -9

<u><em>Even function </em></u>

If f(-x) = f(x) , then the function is even function.

f(-x) = (-x)² -9

      =  x² -9

      = f(x)

f(-x) = f(x)

∴ Given function is an even function

b)

Given g(x) = |x -3|

<u><em>Even function </em></u>

If g(-x) = g(x) , then the function is even function.

g(-x) = |-(x-3)|

      = |x-3|

g(-x) = g(x)

∴ Given function is an even function

c)

<u><em>odd function</em></u>

If f(-x) =- f(x) , then the function is odd function.

f(-x) = f(-x) = \frac{-x}{(-x)^{2}+1 } = \frac{-x}{x^{2}+1 } = - f(x)

      = -f(x)

f(-x) = -f(x)

∴ Given function is odd function

d)

If g(-x) = g(x) , then the function is even function.

g(x) = x + x²

g(-x) =  -x + (-x)²

     = - (x - x²)

This is not either even or odd function

∴ Given function is neither function

8 0
3 years ago
3. Write an expression using the fewest terms possible that is equivalent to x+x+x+x-20
Igoryamba

Answer:

4x - 20

Step-by-step explanation:

Combine like terms (those with the same amount of variables:

x + x + x + x = 4x

4x - 20 => Note: You cannot combine these two terms, because they do not have the same amount of variables (one having one variable (x), the other being a constant (no variable) ).

~

4 0
3 years ago
A gas station stands at the intersection of a north-south road and an east-west road. A police car is traveling toward the gas s
DanielleElmas [232]

Answer:

a)DL/dt  is positive then L s increasing

b) L still increasing

Step-by-step explanation:

Let´s call O the place for the gas station, A the location point of police car   ( at 5 miles east from the gas station ), and B the location point of the truck ( 12 miles south from a gas station.

The three points shape a right triangle with L (distance between police car and truck) then

L²  = OA² + OB²   at the point police car is 5 miles east and truck 12 miles south ( both from gas station)

L²  =  ( 5)² + (12)²

L  = √ 25 + 144

L = √169

L = 13 miles

Pitagoras theorem establishes in a right triangle hypotenuse L is:

L²  = a² + b²          a and  b are the legs then

In general

L²  =  x²  +  y ²           x and y the legs over distance police-car/gas station  and  truck/gas station

Differentiation on both sides of the equation with respect to time  give us:

2*L*DL/dt  = 2*x*Dx/dt  + 2*y*Dy/dt

Where  Dx/dt = 130 m/h West   Dy/dt = 100 m/h south

L  =  13  m    x  = 5  m   y  =  12

Then by substitution

2*13*DL/dt   = 2*5*130 + 2*12*100

DL/dt = (1300+ 2400) / 26

DL/dt = 142 m/h

DL/dt  is positive then L s increasing

b) If truck speed is 70 m/h

DL/dt   still positive  but with smaller module, then L still increasing but at smaller speed

DL/dt =  1300 + 2*12*70

DL/dt = (1300 + 1680)/ 26

DL/dt = 114,6 m

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