Answer:
In geometry, the circumference is the perimeter of a circle or ellipse. That is, the circumference would be the arc length of the circle, as if it were opened up and straightened out to a line segment. More generally, the perimeter is the curve length around any closed figure.
formula of circumference: C=2πr
Suppose
is a random variable representing student GPAs. Then
is normally distributed with mean 2.9 and standard deviation 0.5, so you have
where
is a random variable also representing student GPAs, but follows the standard normal distribution with mean 0 and standard deviation 1.
The proportion of students with GPA between 1.9 and 3.9 is then equivalent to the proportion of the distribution that lies within two standard deviations of the mean. If you know the empirical rule (aka the 68-95-99.7 rule) then you should already know that
.
Otherwise you could consult a table of
scores to find the same (perhaps more accurate) probability.
250/50=5
5x15=75
75 people out of 250 will NOT be wearing hats
Answer:
Only E applies.
Step-by-step explanation:
The simplified version of the equation would be 6x + 7.5 + 15
In other words, there are 6 squares, 3 triangles that in total make 7.5 in weight, and 5 circles that make 15 pounds in total. E is the only one with accurate values. You don't even need to acknowledge the x. All you have to do is count.
Answer:
A
Step-by-step explanation:
You divided -7x by -7, the -7's cancel out leaving x