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3 years ago

Find the surface area of a cylinder with a base radius of 3 in and a height of 8 in.

Mathematics

1 answer:

Tom [10]3 years ago

5 0

Answer:

66π in²

Step-by-step explanation:

Area of one circular base: πr² ⇒ π3² ⇒ 9π

Area of the two circles: 9π + 9π = 18π

We know that the length of the rectangle is 8 in, but we still have to find width. The width of the rectangle is the circumference of either circle:

Width of rectangle: 2πr ⇒ 2π3 ⇒ 6π

Area of rectangle: 6π · 8 = 48π

Total Surface Area: 48π + 18π = 66π in²

Total Surface Area (using the π symbol on a calculator)≈ 207.345 in²

Hopefully this helps!

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weeeeeb [17]

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3 years ago

Two parallel lines are crossed by a transversal.

Alja [10]

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3 years ago

Plz help me with this problem

Evgen [1.6K]

First we rearrange by using the definition of between.
AB=x+10, BC=x+14, AC=22
Given that AB+BC=AC, we can solve for X
(X+10)+(X+14)=22
X+10+X+14=22
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3 years ago

The owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the club. She would now like to det

Maru [420]

Answer:

0.077994

Step-by-step explanation:

Given that the owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the club.

$H_0: Mean = 30\\H_a: Mean >30$

(Right tailed test)

Sample size = $n=250$

Sample mean = 30.45

Mean difference = $30.45-30=0.45\\$

Sample std dev s = 5

Sample std error = $\frac{5}{\sqrt{n} } =\frac{5}{\sqrt{250} } \\=0.3163$

Test statistic = Mean diff/std error = $=\frac{0.45}{0.3163} =1.423$

Since population std deviation is not know we use t test

p value = $0.077994$

4 0

3 years ago

ASAP i need this TODAY PLEASE)For a survey, students in a class answered these questions: Do you play a sport? Do you play a mus

kondaur [170]

To the nearest percentage point, what percentage of students who play a sport don’t play a musical instrument?

First, using the information given, fill out the chart with the rest of the data (in the image attached)

Then find the number of students who play a sport and don’t play a musical instrument, which in the chart is 11

Place 11 over the total: $\frac{11}{25}$ and convert to a percentage:

44%

5 0

3 years ago