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2 years ago

What is the derivative of e^(2x)

1 answer:

5 0

Using the chain rule: The derivative of e^u is (e^u)(u'). Notice that e^u is rewritten exactly as is and then multiplied by the derivative of the exponent.
Let u=2x. So u'=2
So the derivative of e^u is e^(2x)*2 This can also be written as 2e^(2x).

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Felipe made $221 for 17 hours of work.

VMariaS [17]

He would have to work 13 hours

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1 year ago

If the price of pineapple juice was $4.50 a gallon and it is now $5.75 a gallon, what is the percentage change in price

Kitty [74]

Answer:

1 doller and 25 cents so easy

Step-by-step explanation:

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1 year ago

Janna buy 2bags of food for her dogs one bag weighs 37 pound the other bag weighs 15 pounds how many pounds do both bags weigh e

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Answer:

52 pounds

Step-by-step explanation:

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2 years ago

An employee earns $28.50 after 3 hours and $237.50 after 25 hours. What is the slope? What does the slope represent?

konstantin123 [22]

Answer:

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2 years ago

A research group needs to determine a 90% confidence interval for the mean repair cost for all car insurance small claims. From

lutik1710 [3]

Answer:

a) $z = 1.645$

b) The should sample at least 293 small claims.

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:

$\alpha = \frac{1-0.9}{2} = 0.05$

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

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$ , which means that the answer of question a is z = 1.645.

Now, find the margin of error M as such

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

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

(b) If the group wants their estimate to have a maximum error of $12, how many small claims should they sample?

They should sample at least n small claims, in which n is found when

$M = 12, \sigma = 124.88$ . So

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

$12 = 1.645*\frac{124.88}{\sqrt{n}}$

$12\sqrt{n} = 205.43$

$\sqrt{n} = \frac{205.43}{12}$

$\sqrt{n} = 17.12$

$\sqrt{n}^{2} = (17.12)^{2}$

$n = 293$

The should sample at least 293 small claims.

8 0

2 years ago