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4 years ago

All real numbers at least 3 units from -2

2 answers:

7 0

Such numbers are divided into two sets.
The first set is (-infinity, -5]. All numbers in this set are 3 or more units from -2.
The second set is [1, infinity). Same reasoning.
Drawing a diagram might help you understand this problem better.

SVEN [57.7K]4 years ago

3 0

Yes the are real 3 -2

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Ab- 0.5b + 1/2 when a = 1 and b = 5

aniked [119]

Since you already know the values of a and b, all you have to do is split the problem into little parts and plug everything into its spot. AB would equal 1(5) which is 5. Athens 0.5b would equal, 0.5(5) to equal 2.5. So now your equation is 5-2.5+1/2 which equals 3.

7 0

3 years ago

HELP PLEASE AND THANKS

Novay_Z [31]

The answer would be an Exponential Funtion.
I hope this helps love! :)

4 0

4 years ago

A group of physical education majors was discussing the heights of female runners and whether female runners tended to be tall,

Anna11 [10]

Answer:

The 90% confidence interval for the mean µ of the population of female runners.

( 65.0328 , 66.5672)

Step-by-step explanation:

Given A sample of 12 runners showed a sample mean height of 65.80 inches and a sample standard deviation of 1.95 inches.

Given sample size is n = 12 <30 so small sample

Given sample mean (x⁻) = 65.80 inches

sample standard deviation (S) = 1.95 inches.

Assume the population is approximately normal.

The 90% confidence interval for the mean µ of the population of female runners.

$(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } ,x^{-} +t_{\alpha } \frac{S}{\sqrt{n} } )$

substitute all above interval

$(65.80 - t_{\alpha } \frac{1.95}{\sqrt{12} } ,65.80 +t_{\alpha } \frac{1.95}{\sqrt{12} } )$

The degrees of freedom γ=n-1 = 12-1=11

From t- table = 1.363 at 90 % 0r 0.10 level of significance

$(65.80 -1.363 \frac{1.95}{\sqrt{12} } ,65.80 +1.363 \frac{1.95}{\sqrt{12} } )$

on calculation , we get

(65.80 -0.7672 ,65.80 + 0.7672)

( 65.0328 , 66.5672)

8 0

3 years ago

State the measurement scale for each. a. Cholesterol level b. Defect type c. Time of first class d. Opinion on a 5 point scale,

enyata [817]

Answer: a. Ratio b. Nominal c. Interval d. Ordinal

Step-by-step explanation:

1)Ratio:You can do all sort of arithmetic on the cholesterol level.

2)Nominal: These cannot be ordered or arithmetic cannot be applied

3)Interval: It is interval because it is a number and midnight means 0 so you cannot use it for division

4)Ordinal: You can arrange it in increasing or decreasing order.

6 0

4 years ago

How do you write 4/ 9 as a decimal?

olasank [31]

Answer:

.4 repeating

Step-by-step explanation: divide the top number by the bottom number so 4 divided by 9

7 0

3 years ago