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3 years ago

What is the surface area of a cylinder with a height of 20 meters and a diameter of 8 meters?

Mathematics

1 answer:

tankabanditka [31]3 years ago

4 0

surface area = 2*(pi)*r*h+2*(pi)*r^2

using 3.14 as pi

2*3.14*4*20 + 2*3.14*4^2 = 602.88m^2

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Help help please please

trapecia [35]

9514 1404 393

Answer:

b = √32

Step-by-step explanation:

The Pythagorean theorem tells you the relation between the side lengths is ...

2² + b² = 6²

b² = 36 -4 = 32

b = √32

_____

<em>Additional comment</em>

This radical can be simplified by removing a square from under the radical.

$b = \sqrt{32}=\sqrt{16\cdot2}=\sqrt{16}\cdot\sqrt{2}=4\sqrt{2}$

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2 years ago

at the football game on friday andrew threw 15 passes. he completed 10 for 120 yards what was his average per completion

Sunny_sXe [5.5K]

Answer:

120 divided by 10 is 12 yards per completion

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3 years ago

In a random sample of 190 people, 151 said that they watched educational television. Find the 90% confidence interval of the tru

xz_007 [3.2K]

Answer:

(0.7465 , 0.8429 )

Step-by-step explanation:

Confidence Level - "P" values

90% 1.645

Confidence Interval - "P" values

(0.7465 , 0.8429 )

7 0

3 years ago

Which operation properly transforms matrix I to matrix II?

Y_Kistochka [10]

Answer:

Step-by-step explanation:

Replace R1 with 1 and R3 with 0 you have -2(1)+0 which equals 0 and that matches matrix II. Repeat the process with the other numbers in R1 and R3 and they all come out equal therefor the answer is D.

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3 years ago

Help me please I’m begging you:(

alex41 [277]

Answer:

Chips = 14

Pretzel = 14

Cookie = 8

Popcorn = 13

Question Mark = 222

Step-by-step explanation:

First Equation:

Chips + Pretzel + Chips = 42

Third Equation: Chips = Pretzel.

This means that

Pretzel + Pretzel + Pretzel = 42

Pretzel = $\frac{42}{3} =14$

Chips = Pretzel

Chips = $14$

Second Equation:

Cookie + Chips + Cookie = 30

We know that Chips = 14.

Cookie + 14 + Cookie = 30

Subtract 14 on both sides:

Cookie + Cookie = 16

Cookie = $16\div 2 =8$ .

Fourth Equation:

Cookie + Cookie + Popcorn = 29

We know that Cookie = 8.

8 + 8 + Popcorn = 29

16 + Popcorn = 29

Subtract 16 on both sides:

Popcorn = 13.

Question Mark:

(Popcorn + Popcorn) $\times$ Cookie + Chips = (13 + 13) $\times$ 8 + 14 = 26 $\times$ 8 + 14 = $208+14=222$

6 0

3 years ago

Read 2 more answers