Answer:
2 meters
Step-by-step explanation:
To find the maximum length of the seesaw, we just need to use the sine relation its angle with the ground.
The opposite side to the angle of 30° is the maximum height of 1 meter, and the hypotenuse is the length of the seesaw. So we have that:
So the maximum length of the seesaw is 2 meters.
5x + 2 = 22
5x = 22 - 2
5x = 20
x = 20/5
x = 4
Answer:
y=7
Step-by-step explanation:
x+y=12
x=5
12-5=7
The sample proportion has an approximately normal distribution, with the mean being the population mean and the standard deviation (i.e. the standard error of the sampling proportion) equal to
SE = sqrt(p*q/n) where p is the population proportion q is 1-p, and n is the sample size.
<span>(Typically, for a confkdence interval, the sample proportion and its complement are substituted for p and q.) </span>
The margin of error will be Zc*SE, where Zc is the critical value of Z for the level of confidence required. The confidence interval, then, will be the sample proportion, plus or minus the margin of error.
For a 90% confidence interval, Zc is 1.645.
<span>So the margin of error is 1.645 * sqrt(.9*.1/400), roughly .025. So your confidence interval would be around [.875, .925]
The best and most correct answer among the choices provided by your question is the second choice or letter C which is 3%.
I hope my answer has come to your help. Thank you for posting your question here in Brainly.</span>