Answer:
0.8914
Step-by-step explanation:
You want to find the z-values associated with the x-values:
z = (x -μ)/σ
z1 = (57 -90)/12 = -2.75
z2 = (105 -90)/12 = 1.25
Look up these values in a probability table and find the difference of the table values.
p(z < z1) ≈ 0.00298 . . . . from a table or calculator
p(z < z2) ≈ 0.89435 . . . . from a table or calculator
p(57 < x < 105) ≈ 0.89435 -0.00298 = 0.89137 ≈ 0.8914
So if the 3 is on the outside of the parenthesis 3( it means you have to multiply 3 times the numbers inside the parenthesis. 3 X n+7 + 3n + 21. hope this hint helps.
Add like terms. Ignore parenthesis. And change the negative in front of the 2 into a positive. 4y minus y and 3 plus 2 makes... 3y+5
65.8 is equivalent to <span> -6+ 4 5 −8.2+ 3 5
</span>
Answer:
Step-by-step explanation:
Given
Required
Calculate the diameter
The area of a sector is:
Substitute values for Area and 
Divide both sides by 
Make 
the subject
Take positive square roots of both sides
The diameter is then calculated as:
