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Mazyrski [523]
3 years ago
8

Context does not dictate when to overestimate and when to underestimate always round down true or false

Mathematics
2 answers:
Sphinxa [80]3 years ago
8 0

Answer: A, Speaking of context, it would have been nice to get some.


Step-by-step explanation:


konstantin123 [22]3 years ago
4 0

Answer:

False

Step-by-step explanation:

If a situation calls for something to be "at least" a number we would typically round up.  For example, if we have a problem that states we need to buy at least $50 worth of items, and solving the problem we get an answer of

x ≥ 6.8,

we would need to round up to 7 items.  6 items is less than 6.8, so it would not work.  However, 7 items is greater than 6.8, so it would work.

If a situation calls for something to be "at most" a number, we would typically round down.  For example, if we had a problem where we could buy at most $100 worth of items, and solving it we get

x ≤ 4.8,

we would round to 4.  We would not have enough money to buy 5 items, so we cannot round up.  However, we can buy 4 items, so we round down to 4.

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B

Step-by-step explanation:

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3 years ago
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2 1/4 x 10 + 22.5

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part 1)

so the radius of the smaller gear is 3 inches, so after a full rotation, namely a revolution, the smaller gear has covered an arc of 2π(3), or 6π.

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\bf \textit{arc's length}\\\\&#10;s=r\theta ~~&#10;\begin{cases}&#10;r=radius\\&#10;\theta =angle~in\\&#10;\qquad radians\\&#10;------\\&#10;s=6\pi \\&#10;r=7&#10;\end{cases}\implies 6\pi =7\theta \implies \cfrac{6\pi }{7}=\theta



part 2)

since the larger gear has a radius of 7, in a revolution it will have an arc of 2π(7), or 14π.

now, we know the smaller gear does a 6π arc in a revolution, how many revolutions will it do in an arc of 14π?

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Step-by-step explanation:

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