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miskamm [114]
2 years ago
6

The temperature of magnesium must be at least 650 degrees for the metal to melt. A sample of magnesium is currently 255 degrees.

The temperature of the magnesium is increased by 10 degrees every minute. Which inequality shows the number of minutes (m) needed to raise the temperature to the melting point?
A m >39.5
B m greater then equal to 39.5
C m > 87.5
D m greater then or equal to 87.5
Mathematics
1 answer:
Agata [3.3K]2 years ago
8 0
The total temperature of the magnesium sample is its original temperature plus the temperature increase which is dependent on time. This total should exceed 650 degrees. Thus, the inequality that best describes the condition is,                
                                        255 + 10m ≥ 650
                                                   m ≥ 39.5
The answer is letter b. 
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1 year ago
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Answer:

Step-by-step explanation:

Hello!

The variable is X: iron level on human blood.

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Max= 51.99

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Without warning 50.22<X[bar]<52.78

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<u>Sample 2 </u>

Min= 50.32

Max= 52.56

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Without warning 50.22<X[bar]<52.78

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<u>Sample 3</u>

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A piece of paper is to display ~128~ 128 space, 128, space square inches of text. If there are to be one-inch margins on both si
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Answer:

The dimensions of the smallest piece that can be used are: 10 by 20 and the area is 200 square inches

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We have that:

Area = 128

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Width = y

So:

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128 = x * y

Make x the subject

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The length becomes:

Length = x + 1 + 1

Length = x + 2

When 2 inch margin is at both sides

The width becomes:

Width = y + 2 + 2

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A = (x + 2) * (y + 4)

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A = (\frac{128}{y} + 2) * (y + 4)

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A = \frac{512}{y} + 2y + 8+128

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A' = 0

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The above value is:

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This means that the calculated values are at minimum.

<em>Hence, the dimensions of the smallest piece that can be used are: 10 by 20 and the area is 200 square inches</em>

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