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tino4ka555 [31]
3 years ago
7

Cydney.bulit a display stand out of two cubes. The large Cube is 8 inches on each side. The smaller cube is 4 inches on each sid

e. She painted the entire outside of each cube before she put the cubes together.
1. What was the surface area she painted for the smaller cube?


2. What was the surface area she painted of the large cube

3. What was the total area that she painted on both Cubes
Mathematics
1 answer:
wlad13 [49]3 years ago
4 0

Answer:

Step-by-step explanation:

Surface area formula= 6×side^2.

1. Side=4=>area=6×4^2=6*16=96 inches^2.

2.side=8=>area=6×8^2=6*64= 384 inches^2

3. 384+96=480 inches^2

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The pipe fitting industry had 546.5 thousand jobs in 2015 and is expected to decline at an average rate of 3 thousand jobs per y
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Answer:

The amount of jobs from fitting industry shall decline in 5.5 percent from 2015 to 2025.

Step-by-step explanation:

Due to the assumption of a yearly average rate, a linear function model shall be used. The expected amount of jobs (n) after a certain amount of years (t) is given by the following formula:

n = n_{o} + \frac{\Delta n}{\Delta t}\cdot t

Where:

n_{o} - Initial amount of jobs in pipe fitting industry, measured in thousands.

\frac{\Delta n}{\Delta t} - Average yearly rate, measured in thousands per year. (A decline is indicated by a negative sign)

If n_{o} = 546.5, t = 2025-2015 = 10\,years and \frac{\Delta n}{\Delta t} = -3\,\frac{1}{years}, then:

n = 546.5+\left(-3\,\frac{1}{year}\right)\cdot (10\,years)

n = 516.5

The percent change in jobs from pipe fitting industry is calculated as follows:

\%n = \left(1-\frac{n}{n_{o}}\right)\times 100\,\%

\% n = \left(1-\frac{516.5}{546.5}\right)\times 100\,\%

\%n = 5.5\,\%

The amount of jobs from fitting industry shall decline in 5.5 percent from 2015 to 2025.

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