Answer:
12 toys
Explanation:
Rita put away 12 toys because she put away all of the toy dogs (6) and all of the toy cats (6). 6 + 6 = 12. So, she put away a total of 12 toys.
Answer:
not clear question
Step-by-step explanation:
On a unit circle, 120 is in the second quadrant. the terminal line form a 60 degree angle with the negative part of the x axis, the x value is -1/2, and the y value is √3/2
tan120=(√3/2)/(-1/2)=-√3
Answer:
Step-by-step explanation:
Given that X is a random variable representing the amount of sleep each adult in New York City got last night.
a) Normal distribution (by central limit theorem)
b) Sample mean will approach population mean mu
c) the standard deviation σx of the sampling distribution approach to σ/√n
d) The means are the same.
. The standard deviations are σ / √50 and σ / √100, respectively.
Answer:
.
Step-by-step explanation:
Given:
We need to find 
.
Solution:
Now we can see that given figure is a rectangle with diagonals drawn in it.
So by properties of rectangle which states that;
"All angles of a rectangle are 90°."
So we can say that;
But
Substituting the values we get;
Subtracting both side by by 31 we get;
Hence .
