This should be the correct answer. i hope this helps you out.
have a nice and wonderful day :)
2cos^2 x = 1 + cos 2x
cos^2 x = 1/2(1 + cos 2x)
f(x) = 6cos^2 x - 4 sin 2x = 6(1/2(1 + cos 2x) - 4 sin 2x = 3 + 3cos 2x - 4sin 2x
To solve this problem, we use the formula:
z = (x – u) / s
where z is the z score value which can be obtained from
the tables, x is the sample value, u is the mean = 6.3 min, and s is the std
dev = 2.2 min
at P value = 0.90, the z = 1.28, finding for x:
x = z s + u
x = 1.28 * 2.2 + 6.3
x = 9.116
at P value = 1.0, the z = 3.49, finding for x:
x = z s + u
x = 3.49 * 2.2 + 6.3
x = 13.978 ~ 14
Therefore the longest 10% calls last about 9.1 minutes to
14 minutes
Answer: 12.5%
Step-by-step explanation:
80x 12.5%=10
80+10=90
Answer:
Well, for one thing I can't read the image--it's too small!
But I know these problems well. If I am correct, this is a spinner probability problem.
Your spinner appears to have 5 sectors, all equal in area, therefore making their probability equal.
So each of those has a prob of 1/5 in the scheme of things.
To find the combonational probability below, multiply the prob of each outcome together to find each.
Have a great day, and feel free to comment with questions!
:)
