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3 years ago

Plz check my answers

Mathematics

2 answers:

Alona [7]3 years ago

8 0

on 40)

15*38 is indeed 570, however you have two decimals from 0.15, so you move two decimals over, 5.70.

on 42)

160*75 is indeed 12000, however you have two decimals as well, from 0.75, thus 120.00

43)

you have two decimals again, from 0.24, so is 8.4.

44)

again, you have two decimals, though 2*74 is indeed 148, if we move the dot two decimals over, is 1.48.

alex41 [277]3 years ago

3 0

answer 43 is wrong im gonna say because something doesnt add up

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Answer:

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c. Fractional uncertainty = 0.074

Step-by-step explanation:

a. Average weight

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= (155.1 + 154.8 + 155.5 + 155.3 + 154.6)/5 = 775.3/5 = 155.06 which is approximately 155.1

b. Standard deviation

Mathematically; we calculate that using the formula;

√{(x-mean)^2/(N-1)}

Please check attachment for for the complete breakdown of this

c. Fractional uncertainty

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3 years ago

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lozanna [386]

Answer:

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