3 years ago

Help! If a sphere has a radius of 8mm, what is its volume? (Show work)

1 answer:

7 0

The formula for the volume of a sphere is V = (4/3) * π * r³. Knowing this, we can plug in the radius:

$V = \frac{4}{3} \pi *8^{3} \\ V = \frac{4}{3} \pi*512 \\ V = 2144.66$

The sphere's volume is approximately 2144.66 mm^3.

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An orange traffic cone has a diameter of 10 in. and a height of 28 in.

masha68 [24]

Answer:

733 inches

Step-by-step explanation:

V= 3.14*5^2*28/3

Order of Operations (PEMDAS)

5^2=25

25*3.14= 78.5

78.5*28= 2198

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Round to nearest cubic inch

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8 0

3 years ago

Solve y=-3x² + 4.5x – 20<br> Use the Quadratic formula

statuscvo [17]

Answer:

$x=0.75 \pm 2.47067i$

Step-by-step explanation:

Quadratic Formula: $x=\frac{-b \pm \sqrt{b^2-4ac} }{2a}$

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Step 1: Define

y = -3x² + 4.5x - 20

a = -3

b = 4.5

c = -20

Step 2: Substitute and Evaluate

$x=\frac{-4.5 \pm \sqrt{4.5^2-4(-3)(-20)} }{2(-3)}$

$x=\frac{-4.5 \pm \sqrt{20.25-240} }{-6}$

$x=\frac{-4.5 \pm \sqrt{-219.75} }{-6}$

$x=\frac{-4.5 \pm \sqrt{219.75}(\sqrt{-1} ) }{-6}$

$x=\frac{-4.5 \pm i\sqrt{219.75} }{-6}$

$x=\frac{4.5 \pm i14.824 }{6}$

$x=0.75 \pm 2.47067i$

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3 years ago

Logan is going to use a computer at an internet cafe. The cafe charges an initial fee to use the computer and then an additional

aalyn [17]

Answer:

Step-by-step explanation:

Hourly rate is $1.5

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2 years ago

Ann is participating in a 4-day cross country biking challenge. She biked for 65, 69, and 45 miles on the first three days. How

GenaCL600 [577]

Answer:

the answer is 69

hope i helped <3

Step-by-step explanation:

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2 years ago

What is 5 cm to km? is it 0,00005? if im wrong please correct me because tomorrow i have exam

astra-53 [7]

It's 0.00005 so yeah you're correct

3 0

3 years ago

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