Answer:
C
Step-by-step explanation:
C: AB is the radius of both circles.
Answer:
Step-by-step explanation:
Trapezoid
Solve for area
A=44
a Base
5
b Base
17
h Height
4
Answer:
0.545455
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
Answer:
The probability that the diameter falls in the interval from 2499 psi to 2510 psi is 0.00798.
Step-by-step explanation:
Let's define the random variable,
"Comprehensive strength of concrete". We have information that
is normally distributed with a mean of 2500 psi and a standard deviation of 50 psi (or a variance of 2500 psi). In other words,
.
We want to know the probability of the mean of X or
that falls in the interval
. From inference theory we know that :

Now we can find the probability as follows:

Where
, then:
