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2 years ago

What is the volume of a right circular cylinder with a radius of 2 feet and a height of 3 feet?

Mathematics

1 answer:

lisabon 2012 [21]2 years ago

4 0

Answer:

B. 12π ft.³

Step-by-step explanation:

volume of cylinder = πr²h

= π × 2² × 3

= π × 4 × 3

= 12π

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2v^2-12 =-12v Would really appreciate it loves❤️

Black_prince [1.1K]

For this case we have the following equation:

$2v ^ 2-12 = -12v$

Rewriting we have:

$2v ^ 2 + 12v-12 = 0$

Dividing by 2 to both sides of the equation:

$v ^ 2 + 6v-6 = 0$

We apply the quadratic formula:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

We have to:

$a = 1\\b = 6\\c = -6$

Substituting:

$x = \frac {-6 \pm \sqrt {6 ^ 2-4 (1) (- 6)}} {2 (1)}\\x = \frac {-6 \pm \sqrt {36 + 24}} {2}\\x = \frac {-6 \pm \sqrt {60}} {2}\\x = \frac {-6 \pm \sqrt {4 * 15}} {2}\\x = \frac {-6 \pm2 \sqrt {15}} {2}$

Thus, we have two roots:

$x_ {1} = - 3+ \sqrt {15}\\x_ {2} = - 3- \sqrt {15}$

ANswer:

$x_ {1} = - 3+ \sqrt {15}\\x_ {2} = - 3- \sqrt {15}$

7 0

3 years ago

7. One day in Mayville, the temperature went from -11F at 4 AM to 28°F at 2 PM. How many degrees did the temperature rise?

viva [34]

Answer:

Step-by-step explanation:

6 0

2 years ago

5s + 7s????????????????

natali 33 [55]

Answer:

12s

Step-by-step explanation:

5s + 7s = (5 + 7) s= 12s

This is your answer

8 0

3 years ago

Read 2 more answers

Pls help (I attached an image that explains the question)

masha68 [24]

I think it’s c or b but I’m positive it’s b

5 0

2 years ago

Read 2 more answers

What is the value of x? Enter your answer in the box. x =

antoniya [11.8K]

Answer:

It's answer is 8

Step-by-step explanation:

hypotenuse (h) = 10

base (b) = 6

perpendicular (p) = x = ?

We know by using Pythagoras theorem

p = √ h² - b²

= √ 10² - 6²

= √ 100 - 36

= √ 64

x = 8

Hope it will help : ) ❤

3 0

2 years ago