Tina recorded these temperatures in one day:

Mathematics

1 answer:

ra1l [238]4 years ago

8 0

Answer: the night temperature was 3 degrees below the afternoon temperature

Step-by-step explanation:

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Find the value of x in the picture please

nika2105 [10]

The answer is B-40.

It is an acute angle so it can not be 155 but the angle does not look like it is close to being 90 degrees so the answer has to be 40!

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3 years ago

What is the width of a rectangle with a length of 3/7 ft and an area of 2 ft squared

Arada [10]

So we’re already know the area of but not the width so to find the area of the rectangle

Area= LxW

So the length is 3/7ft and the area is 2

2= 3/7 x W

W is a missing number

So to find the area multiply l x w right? So we have to reverse it by

2 divided 3/7= 14/3

So the width is 14/3

Check

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3 years ago

What is the word form for 2.51 and expanded form

Nimfa-mama [501]

Word Form:
Two and fifty-one hundredths

Expanded Form:
2 + 0.5 + 0.01

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3 years ago

The life of a manufacturer's compact fluorescent light bulbs is normal, with mean 12,000 hours and standard deviation 2,000 hour

vitfil [10]

Z value is a numerical measurement that describe a value relationship to the mean of a group of values. The standard deviations is 1.25 above the mean is 14,500 hours.

<h3>Given information-</h3>

The mean for the bulb is 12,000 hours.

The standard deviation for the bulb is 2000 hours.

Sample value is 14500.

To find out the how many standard deviation is 14500 mean away from the mean the z value of the mean should be calculated.

<h3>Z value</h3>

Z value is a numerical measurement that describe a value relationship to the mean of a group of values. Z value is the ratio of the difference of the sample value $x$ and mean $\mu$ to the standard deviation. Thus the z value for the given mean $\sigma$ is,