Given:
4 rows of ten students.
Probability of a head or tail in a coin toss is 1/2
head: 20 students sitting in the first two rows as your sample
1/2 * 1/20 = 1/40
tail: 20 students sitting in the last two rows as your sample.
1/2 * 1/20 = 1/40
<span>Does every student have an equal chance of being selected for the sample?
</span>
Yes, every student have an equal chance of beings elected for the sample.
Answer: A good way to determine if a line represents a valid function is to use the vertical line test.
To do this, you imagine a vertical (up and down) line moving across your graph from left to right. It should only be touching the line at one point at a time.
If it is touching more than one point on the line at a time, the line is not a valid function.
The first line and its inverse both pass the test.
The second line passes the test, but its inverse does not.
The third line also passes the test, but again, its inverse does not.
The same applies to the fourth line and its inverse.
Step-by-step explanation:
y=cos(x)+2
What is the amplitude of the function?
What is the period of the function?
Answer:
±sqrt(T*L/m)=v
Step-by-step explanation:
T=mv^2/L
We want to solve the equation for v
Multiply each side by L
T*L=mv^2/L
*L
T*L=mv^2
Divide each side by m
TL/m=mv^2/m
T*L/m=v^2
Take the square root of each side
±sqrt(T*L/m)=sqrt(v^2)
±sqrt(T*L/m)=v
