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2 years ago

A piece of wood used for construction is 2 inches by 4 inches by 24 inches . What is the surface area of the wood ?

Mathematics

2 answers:

Kazeer [188]2 years ago

8 0

2•{(2•4)+(2•24)+(4•24)}= 304

Marina CMI [18]2 years ago

4 0

This is a 2 part problem. First, we need to find the area of each side, then add them together. (the question isn't asking for volume).

1) The board has six sides(top, bottom, four sides). the top + bottom are 4 by 24 in, the short sides are 2 by 4 inches, and the long sides are 2 by 24 inches. After multiplying, this gives us 96 sq in + 96 sq in for the top and bottom, 8 sq in and 8 sq in for the short sides, and 48 sq in + 48 sq in for the long sides.

2) If we add all of these together, we get 96 + 96 + 8 + 8 + 48 + 48 = 192 + 16 + 96 = 304 sq inches, which is the total surface area.

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The ratio of adults to children in a movie theater is 7:2. If there are 26 children in the theater, how many adults are there?

Strike441 [17]

Answer: 91. I find the easiest method for questions like this about ratios is to multiply the side of the ratio you are given a value for, in this case the right hand side (children), by a number so it equals the value given. This was 2x13 to equal 26. Then, to find the value of the other side, the adults, you must multiply the left hand side by the same number used on the right hand side. 7x13 equals 91.

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2 years ago

I will mark as brainliest:)

labwork [276]

Hii I believe your option would be D. I hope it helps :)

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2 years ago

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GenaCL600 [577]

Answer: slope = 4

Step-by-step explanation:

slope = m = rise/run = y1-y2/x1-x2

9-1/5-3 = 8/2 = 4

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2 years ago

Ignacio is curious about the average age of cars in the commuter lot at Mis large university. He takes a random

spin [16.1K]

Answer:

Between 12.614 years and 16.386 years

Step-by-step explanation:

Given that:

Mean age (μ) = 14.5 years, standard deviation (σ) = 4.6 years, number o sample (n) and the confidence interval (c) = 90% = 0,9

α = 1 -c = 1 -0.9 = 0.1

$\frac{\alpha }{2} = \frac{0.1}{2} = 0.05$

The z score of $\alpha /2$ is the same as the z score of 0.45 (0.5 - 0.05). This can be gotten from the probability distribution table. Therefore:

$z_{0.05}=1.64$

The margin of error (e) = $z_{0.05}\frac{\sigma}{\sqrt{n} }$ = $1.64*\frac{4.6}{\sqrt{16} }=1.886$

The interval = μ ± e = 14.5 ± 1.886 = (12.614 ,16.386)

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2 years ago

Relate Fractions, Decimals, and Money. Write the money amount as a fraction in terms of dollars. The problems are $0.66 and $1.0

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You convert a decimal to a fraction by putting the digits to the right of the decimal point over "1" followed by the same number of zeros. (Most folks learn this in 3rd or 4th grade.)

0.66 = 66/100 . . . . . 2 decimals, so the denominator is 100

Then you reduce the fraction by canceling common factors. It helps to know your times tables and divisibility rules. (Or you can have your calculator do it.)

0.66 = 66/100 = 33/50
1.00 = 100/100 = 1

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2 years ago