Answer:
-21
Step-by-step explanation:
Answer:
x = 60
Step-by-step explanation:
Add up all the angles, they make 360 since it forms a full circle
(2x-10) + (2x+40) +90 = 360 Combine like terms
4x + 120 = 360 solve for x
4x = 240
x = 60
Answer:
The proportion of trees greater than 5 inches is expected to be 0.25 of the total amount of trees.
Step-by-step explanation:
In this problem we have a normal ditribution with mean of 4.0 in and standard deviation of 1.5 in.
The proportion of the trees that are expected to have diameters greater than 5 inches is equal to the probability of having a tree greater than 5 inches.
We can calculate the z value for x=5 in and then look up in a standard normal distribution table the probability of z.

The proportion of trees greater than 5 inches is expected to be 0.25 of the total amount of trees.