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2 years ago

Find the distance between the points (4, 2) and (-8, 7).

1 answer:

3 0

The answer will be A

Step by Step Calculation

Length = √((x2 - x1)2 + (y2 - y1)2)

= √((-8-(4))2 + (7-(2))2)

= √(144+25)

= √(169)
= 13

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A scale has a percent error of 7%. The scale reads the mass of a book as 450g. Which statement describes what the actual mass of

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Answer:

The actual mass of the book is between 481 . 5 g and 418 . 5 g.

Step-by-step explanation:

The mass of the book on the scale = 450 g

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So, the actual mass of the book is 450 g ± 7%

Now, 7 % of the mass 450 g = $\frac{7}{100} \times 450 = 31.5$

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