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butalik [34]
3 years ago
11

Is 98.45 a rational or irrational number?

Mathematics
2 answers:
wlad13 [49]3 years ago
8 0
Rational, it can be turned into a fraction.
MAVERICK [17]3 years ago
5 0
It is a rational number because 98.45 can be turned into a fraction. 
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Libni added 250 to the product of 63 and 29 what was the sum
katrin2010 [14]

Answer:

The answer is 2077

Step-by-step explanation:

63*20=1260

63*9=567

1260+567=11827

11827*250=2077

7 0
3 years ago
According to a report released by CIBC entitled "Women Entrepreneurs: Leading the Charge," the average age for Canadian business
SOVA2 [1]

Answer:

We conclude that the mean age of Canadian businesswomen has increased.

Step-by-step explanation:

We are given that according to a report released by CIBC entitled "Women Entrepreneurs: Leading the Charge," the average age for Canadian businesswomen in 2008 was 41.

The researchers randomly sample 97 Canadian businesswomen and ascertain that the sample mean age is 43.4. From past experience, it is known that the population standard deviation is 8.95.

Let \mu = <u><em>mean age of Canadian businesswomen.</em></u>

So, Null Hypothesis, H_0 : \mu \leq 41      {means that the mean age of Canadian businesswomen has decreased or remained same}

Alternate Hypothesis, H_A : \mu > 41     {means that the mean age of Canadian businesswomen has increased}

The test statistics that would be used here <u>One-sample z-test statistics</u> because we know about population standard deviation;

                               T.S. =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \bar X = sample mean age of Canadian businesswomen = 43.4

             \sigma = population standard deviation = 8.95

             n = sample of Canadian businesswomen = 97

So, <u>the test statistics</u>  =  \frac{43.4-41}{\frac{8.95}{\sqrt{97} } }

                                     =  2.64

The value of z test statistic is 2.64.

<u>Also, P-value of the test statistics is given by;</u>

             P-value = P(Z > 2.64) = 1 - P(Z < 2.64)

                           = 1 - 0.99585 = <u>0.00415</u>

Now, at 1% significance level the z table gives critical value of 2.33 for right-tailed test.

Since our test statistic is more than the critical value of z as 2.64 > 2.33, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <em><u>we reject our null hypothesis</u></em>.

Therefore, we conclude that the mean age of Canadian businesswomen has increased.

4 0
3 years ago
the sum of three numbers is 131. The second of three numbers is seven more than twice the first. The third number is 12 less tha
spin [16.1K]
No. 1 = x
No. 2 = 2x+7
No. 3 = x-12

Answer:

x+(2x+7)+(x-12) = 131

From there you solve to get the numbers:

34, 75 and 22
3 0
3 years ago
What is the slope of the line through (−1,−7) and (3,9)?
Alona [7]

Answer:

The slope is 4.

Step-by-step explanation:

Point slope form is y-y1 over x-x1. I put the coordinates in like this.

9-(-7) over 3-(-1) so thats 9+7 over 3+1. 16 over 4 is 4.

8 0
3 years ago
Read 2 more answers
Im not sure how to do this question
Pavel [41]
B. -9 is the most negative one, -2 is the least.
Hope this helps you.
3 0
3 years ago
Read 2 more answers
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