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Gennadij [26K]
3 years ago
10

Type the correct answer in the box. Round your answer to two decimal places.

Mathematics
2 answers:
Rasek [7]3 years ago
3 0

Answer:

13 units

Step-by-step explanation:

3^2+2^2=\sqrt{13^2} \\9+4=13

Paul [167]3 years ago
3 0

Answer:

The length of BC is 3.61 units.

Step-by-step explanation:

√13=3.60555128=3.61 (Round off to two places)

According to Pythagoras theorem,

Hypotenuse²=Perpendicular²+Base²

H²=P²+B²

Perpendicular given=3 units

Base given=2 units

H²=3²+2²

H²=9+4

H²=13

H=√13 units

H=3.61 units (approx)

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The local baseball team won the national championship last year. At the start of the baseball season, shirts signed by the team
LenKa [72]

Answer:

Step-by-step explanation:

Multiplier: -175/3 Decrease: 23⅓ %

Step-by-step explanation: 75 = 250 - 3(d) d = -175/3 Y = 250 - (175/3)m

Where m is the no.

of months Y is the new value

(175/3)/250 × 100 = 70/3 %

Or 23⅓ %  

3 0
3 years ago
A manufacturer of a new medication on the market for Alzheimer's disease makes a claim that the medication is effective in 65% o
NeX [460]

Answer:

z=\frac{0.639 -0.65}{\sqrt{\frac{0.65(1-0.65)}{180}}}=-0.309  

p_v =P(z  

So the p value obtained was a very high value and using the significance level given \alpha=0.05 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the proportion of adults with the medication was effective is not significantly less than 0.65

Step-by-step explanation:

Data given and notation

n=180 represent the random sample taken

X=115 represent the adults with the medication was effective

\hat p=\frac{115}{180}=0.639 estimated proportion of adults with the medication was effective

p_o=0.65 is the value that we want to test

\alpha=0.05 represent the significance level

Confidence=95% or 0.95

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that true proportion is less than 0.65.:  

Null hypothesis:p \geq 0.65  

Alternative hypothesis:p < 0.65  

When we conduct a proportion test we need to use the z statisitc, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.639 -0.65}{\sqrt{\frac{0.65(1-0.65)}{180}}}=-0.309  

Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The significance level provided \alpha=0.05. The next step would be calculate the p value for this test.  

Since is a left tailed test the p value would be:  

p_v =P(z  

So the p value obtained was a very high value and using the significance level given \alpha=0.05 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the proportion of adults with the medication was effective is not significantly less than 0.65

3 0
3 years ago
PLEASE HELP, DUE SOON !!
nydimaria [60]

Answer:

-0

Step-by-step explanation:

W = -3

X = 3

Z = -9

Y = 6

-3 + 3 = 0

-9 + 6 = -3

-3 + 0 = -3

Then -3 is closest to -0! Cause when rounding, 4 and under as an example as 24 the round will be 20! And 25 will be 30

8 0
2 years ago
( 19, 6), (15. 16). what is the slope?
Brrunno [24]

Answer:

-5/2

to find slope you have to do y2-y1 over x2-x1 so it would be

16-6/15-19 ect.

5 0
2 years ago
37 + 3 * ( 15 hundreds / 3 tens)<br><br> 1) 52<br> 2) 90<br> 3) 150<br> 4) 187
const2013 [10]

Answer:

3, 150

Step-by-step explanation:

150 is the correct answer

4 0
2 years ago
Read 2 more answers
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