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4 years ago

Evaluate f(x) = -2x square Root -4 for x=3

Mathematics

1 answer:

lesya [120]4 years ago

8 0

Answer:

Step-by-step explanation:

f(x)=-2x(sqrt(-4))

-2(3)sqrt(-4)

-6(2i)

-12i

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Help pls the image below represents ____

Artemon [7]

Answer:

I think it's a Box Plot, hope this helps

5 0

3 years ago

A SCUBA diver went down to 550 feet below sea level. The entire descent took 10 minutes. What is his

harina [27]

Okay so 550/10 is 55. So he went down 55 feet per minute. Or in otherwords, -55 (negative 55). Its negative because your going down.

Heart if it did help!

4 0

3 years ago

Read 2 more answers

he length of time to perform an oil change at a certain automobile repair shop is ap-proximately normally distributed with mean

Simora [160]

Answer:

56.75% probability that a mechanic can complete 16 oil changes in an eight-hour day

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 29.5, \sigma = 3$

What is the probability that a mechanic can complete 16 oil changes in an eight-hour day

16 oil changes in 8 hours is 2 changes per hour, that is, one each 30 minutes.

This probability is the pvalue of Z when X = 30. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{30 - 29.5}{3}$

$Z = 0.17$

$Z = 0.17$ has a pvalue of 0.5675

56.75% probability that a mechanic can complete 16 oil changes in an eight-hour day

4 0

3 years ago

What is 6.62 x 10 ^5 written in standard form?<br> A) 662<br> B) 33.1<br> C) 66,200<br> D) 662,000

igor_vitrenko [27]

The answer is B 33.1

5 0

3 years ago

The radius of the cone is 1.25 inches, and its height is 2.75 inches. If the diameter of the bubble gum ball is 0.5 inches, what

nasty-shy [4]

<h2>Explanation:</h2><h2></h2>

The volume of a cone can be found as:

$V=\frac{1}{3}\pi r^2 h \\ \\ \\ Where: \\ \\ V:Volume \\ \\ r:radius \ of \ base \\ \\ h:height$

Given the radius and height, we can find the volume of the cone:

$V=\frac{1}{3}\pi r^2 h \\ \\ V=\frac{1}{3}\pi (1.25)^2(2.75) \\ \\ V=\frac{1}{3}\pi(1.5625)(2.75) \\ \\ V\approx 4.5in^3$

The volume of a sphere is:

$V=\frac{4}{3}\pi r^3 \\ \\ \text{Each gum ball has a diameter of 0.5in, so the radius is:} \\ \\ r=\frac{0.5}{2}=0.25in$

So, for each gum ball the volume is:

$V=\frac{4}{3}\pi r^3 \\ \\ V=\frac{4}{3}\pi (0.25)^3 \\ \\ V=0.065in^3$

Therefore, the he closest approximation of the volume of the cone that can be filled with flavored ice is:

$4.5-0.065=4.43in^3$

Conclusion: The volume of the cone that can be filled with flavored ice is 4.43 cubic inches.

3 0

4 years ago