For the data set 4, 5, 10, 11, 15, the mean, x, is 9. What is the standard deviation?
The formula for the sample standard deviation is s =
10-1
q3 (x – 1832.
Use the table to help you.
х
4
5
10
11
X-X (x - x)?
-5
25
-4
16
1
1
2
4
6
36
Sum =
15
Round your answer to the nearest tenth.

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Which equation is true? i. 56 ÷ 4·7 = 82 ÷ (11 + 5) ii. (24 ÷ 8 + 2)3 = (42 + 9)2 neither i nor ii ii only i and ii i only

Which of the following disjunctions is true? 4 + 4 = 16 or 6 - 5 = 11 4 · 3 = 7 or 3 - 2 = 5 8 - 5 = 13 or 7 · 2 = 12 7 - 4 = 11 or 6 + 3 = 9