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Alex787 [66]
3 years ago
7

If a cone is 5 meters tall and has a radius of 3 meters, What is its volume? 15π m3 60π m3 45π m3 30π m3

Mathematics
1 answer:
nydimaria [60]3 years ago
6 0

Answer:

V = 15 pi m^3

Step-by-step explanation:

The volume of a cone is

V = 1/3 pi r^2 h

The radius is 3 and the height is 5

V = 1/3 pi ( 3)^2 *5

V = 15 pi m^3

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The price of a math book is 50$ but you only have 35$ if you get a discount of 20% how much money do you need?
igomit [66]

Price of the book = $50

20% discount = 0.2 x 50 = $10

After discount, the price of the book is

$50 - $10 = $40

I have $35, so I need

$40 - $35 = $5 more

Answer: I need to borrow $5 from a friend.

7 0
3 years ago
Suppose y varies directly with x. Write a direct variation equation that relates x and y. Then find the value of y when x=12
kati45 [8]
So x= 3, y= 7

3/7 = 12/21

Which number times 3 is equal 12
3(4) = 12
So 7(4) = 28

X= 12 , y= 28
7 0
3 years ago
(Can Someone PLEASE Help me) Which of the following steps in this proof contains a flaw?
Vladimir79 [104]
Step 3. It lost track of one power of a on the left side. 

7 0
3 years ago
Without doing any calculations, is positive or negative?<br><br> Explain your reasoning.
andrew-mc [135]
Is WHAT positive or negative?
7 0
3 years ago
Read 2 more answers
Identify the equation in slope intercept from that has a slope of 2 and goes through the point (4, 6).
Mars2501 [29]

Answer:

  y = 2x−2

Step-by-step explanation:

You are given a slope and a point, so you can write the equation using point-slope form:

  y -k = m(x -h) . . . . . . a line with slope m through point (h, k)

Putting in the numbers given, you have ...

  y -6 = 2(x -4)

  y = 2x -8 +6 . . . . eliminate parentheses, add 6

  y = 2x -2 . . . . . . . collect terms.

__

You know that the slope is the coefficient of x, so the first choice is eliminated right away. Trying the point values in the other equations shows you that they only work for the last choice, as shown above.

  • 2·4 +14 = 22 ≠ 6 . . . . second choice doesn't work
  • 2·4 +6 = 14 ≠ 6 . . . . . third choice doesn't work
  • 2·4 -2 = 6 . . . . . . y = 2x-2 is the equation that works
5 0
3 years ago
Read 2 more answers
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