Answer:
3
Step-by-step explanation:
Use the Pythagorean Theorem.
=
+
1369=
+100
-100 -100
1269=
=
3
=x
I think you forgot to attach the image :(
Answer:
49
Step-by-step explanation:
Given:
Width = 0.4
Let's take the z value of 95% which is = 1.96
Let's assume population proportion p1 and p2 = 0.5
For margin of error E, the relation between the width and margin of error is 2E.
i.e 2E = 0.4
E = 0.2
To find the sample size, n, let's use the formula :


= 48.02
≈ 49
For which side length? 10 or 8?
The correct answer is none other than B. I think