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k0ka [10]
3 years ago
15

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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svet-max [94.6K]
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Fantom [35]
Answer: 800pi inches

=======================================

Explanation:

The formula to find the circumference of a circle is
C = pi*d
where
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One full rotation will have the wheel cover a distance of 8pi inches. Imagine that wet paint is on the outer surface of the wheel. If the wheel is rolled out in a straight line, then the wet paint would cover a linear distance of 8pi inches along the flat ground. This is one full rotation, so 100 rotations covers 100*8pi = 800pi inches

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5 0
3 years ago
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