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3 years ago

Can someone help me out please?? I would really appreciate it.

Mathematics

1 answer:

Firdavs [7]3 years ago

4 0

Answer:

C: x = 5 and y = (5√3)/2

Step-by-step explanation:

Looking at the triangle, we can use trigonometric ratios to find x and y since it's a right angled triangle.

Thus;

(5/2)/x = sin 30

x = (5/2)/½

x = 5

Similarly, (5/2)/y = tan 30

tan 30 in surd form is 1/√3

Thus;

(5/2)/y = 1/√3

y = 5/2 × √3

y = (5√3)/2

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Can someone help me with part B

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3 years ago

A Gallup Poll in July 2015 found that 26% of the 675 coffee drinkers in the sample said they were addicted to coffee. Gallup ann

emmasim [6.3K]

Answer:

The 95% confidence interval for the percent of all coffee drinkers who would say they are addicted to coffee is between 21% and 31%.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

A confidence interval has two bounds, the lower and the upper

Lower bound:

$\pi - M$

Upper bound:

$\pi + M$

In this problem, we have that:

$\pi = 0.26, M = 0.05$

Lower bound:

$\pi - M = 0.26 - 0.05 = 0.21$

Upper bound:

$\pi + M = 0.26 + 0.05 = 0.31$

The 95% confidence interval for the percent of all coffee drinkers who would say they are addicted to coffee is between 21% and 31%.

4 0

3 years ago

Witch is greater 6.41 or 6.38

bearhunter [10]

Answer:

6.41

Step-by-step explanation:

if u subtract 6.38 from 6.41 you have .03 left over.

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3 years ago

Read 2 more answers

What's the product of 72100 multiplied by 1.02

butalik [34]

<span>72100 multiplied by 1.02 is 73542
</span><span>
</span>

5 0

3 years ago

Read 2 more answers

Which of the following represents a positive number?

Trava [24]

Answer: OPTION C

Step-by-step explanation:

A positive number must be greater than (>) 0, so lets check which fits this condition.

--------------------------------------------

7.09+(-7.28)=-0.19 NEGATIVE

-12+11.5=-0.5 NEGATIVE

-4.8-(-6.1)=1.3 POSITIVE

-21-(-18.5)=2.5 NEGATIVE

--------------------------------------------

C represents positive number

Hope this helps!! :)

Please let me know if you have any question

3 0

3 years ago