Answer:
D. 8
Step-by-step explanation:
C= 2πr
π= 3.14
C= 25.12
25.12 = 2 * 3.14 * r
r= 4
d= 2r
d= 8
Answer: 2/15
Step-by-step explanation:
25-21/30 = 4/30
4/30 = 2/15
That is right. Angle 2 to side 2 to angle 1 for both of them.The second triangle is just the first upside down.
Answer:

And we can find this probability to find the answer:

And using the normal standar table or excel we got:

Step-by-step explanation:
Let X the random variable that represent the amounts of nocatine of a population, and for this case we know the distribution for X is given by:
Where
and
We have the following info from a sample of n =37:
the sample mean
And we want to find the following probability:

And we can use the z score formula given by;

And if we find the z score for the value of 0.872 we got:

And we can find this probability to find the answer:

And using the normal standar table or excel we got:

Answer:
-6
Step-by-step explanation:
Because 2×(-6) is - 12