3 years ago

This kinda confused me.

Mathematics

2 answers:

Wittaler [7]3 years ago

8 0

I think 36%, but im not 100% sure so im sorry if it is wrong

Deffense [45]3 years ago

6 0

Answer:

50%

Step-by-step explanation:

Half of 68 is 34. We can see that only 34 showed up, making it a 50 percent decrease

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A sample of n = 9 college students is used to evaluate the effectiveness of a new Study Skills Workshop. Each student’s grade po

Vinil7 [7]

Answer:

80% Confidence interval: (0.4603,0.7397)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = MD = 0.60 points

Sample size, n = 9

Sample variance = 0.09

Sample standard Deviation =

$=\sqrt{\text{Sample Variance}} = \sqrt{0.09} = 0.3$

80% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 8 and}~\alpha_{0.20} = \pm 1.397$

$0.60 \pm 1.397(\frac{0.3}{\sqrt{9}} ) = 0.60 \pm 0.1397 = (0.4603,0.7397)$

8 0

4 years ago

Help with right answer please

kari74 [83]

Answer:

Step-by-step explanation:

Keep in mind that 1 week is equivalent to 168 hours, or, alternatively, to (7 days)(24 hours per day). Thus, Answer 5 is correct.

6 0

4 years ago

Can anyone help me solve this?

Novay_Z [31]

Answer:9

Step-by-step explanation:

Use the pythagorean theorem. $a^{2}+b^{2}=c^{2}$

We know both a and c, so it becomes

$4^{2}+b^{2}=\sqrt{97}^{2}$ =

16+b^2=97=

97-16=b^2=

81=b^2=

9=b

7 0

2 years ago

Estimate 3,458,092 × 57

Naddika [18.5K]

Estimate 3458092=3500000~; 57=60~.
3500000*60=210000000.
The answer is 210000000

5 0

3 years ago

A pet store sells tropical fish. One week they sell 15 anglefish, 9 tetras, 42 guppies. The owner uses ratios of sales to compar

Ivahew [28]

Answer: 15:42or simplified 5:14

Step-by-step explanation:

15 angelfish to 42 guppies

15/3= 5

42/3=14

so the ratio of 15:42 is equal to 5:14

5 0

3 years ago