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1 year ago

From the graph below, what are the two intervals that the function is increasing on?

Mathematics

1 answer:

larisa86 [58]1 year ago

4 0

Step-by-step explanation:

The graphed function has its local maximum at x = - 1 and local minimum at x = 2.

The function is decreasing between those points and increasing outside.

The increasing intervals are

x ∈ (- ∞, - 1) ∪ (2, + ∞)

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Makes 12 cinnamon rolls needs to make 30

nignag [31]

Oh thanks Pls help ASAP i don’t have time!!!!!

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2 years ago

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A simple random sample of electronic components wil be selected to test for the mean lifetime in hours. Assume that component li

Serjik [45]

Answer:

189 components must be sampled.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.005 = 0.995$ , so Z = 2.575.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

Assume that component lifetimes are normally distributed with population standard deviation of 16 hours.

This means that $\sigma = 16$

How many components must be sampled so that a 99% confidence interval will have margin of error of 3 hours?

n components must be sampled.

n is found when M = 3. So

$M = z\frac{\sigma}{\sqrt{n}}$

$3 = 2.575\frac{16}{\sqrt{n}}$

$3\sqrt{n} = 2.575*16$

$\sqrt{n} = \frac{2.575*16}{3}$

$(\sqrt{n})^2 = (\frac{2.575*16}{3})^2$

$n = 188.6$

Rounding up:

189 components must be sampled.

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3 years ago

Henry runs 7 miles in 60 minutes. at the same rate, how many miles would he run in 24 minutes?

victus00 [196]

Answer:

2.8 miles

Step-by-step explanation:

Divide 7 miles by 60=0.11666666666

Multiply it by 24

You would get 2.8

Hope this helped

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2 years ago

Multiply <br> 0.105 x 0.7=

Keith_Richards [23]

Answer:

0.0735

Step-by-step explanation:

0.105×0.7=0.0735

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3 years ago

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Ted likes to run long distances. He can run 20 kilometers in 95 minutes. How far will Ted run in 285 minutes? (numeric only) *

nikklg [1K]

Answer:

He will run 60 kilometers.

Step-by-step explanation:

285 / 95 = 3

20 x 3 = 60

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2 years ago