First flip
We know the probability of head is 2/7
Since only 2 things can happen, and both cannot happen at once (mutually exclusive), we write
P(tail) = 1 - P(head) = 1 - 2/7 = 5/7
The probability of tail is 1 minus probability of head.
Second flip
You're still using the sam coin, and whatever you got on the first flip doesn't affect your chances of getting head... on the second flip, I mean. So,
2/7; 5/7; 2/7; 5/7
from top to bottom
To determine the extent of how many times greater is the
number of bacteria in petri dish A than petri dish B, we simply have to take the
ratio of the two.
1.75 x 10^18 / 6.25 x 10^15 = 280
So the bacteria in petri dish A is 280 times larger.
In scientific notation:
<span>2.8 x 10^2</span>
Answer:

All real numbers greater than or equal to 
Step-by-step explanation:
we know that
The equation of a vertical parabola in vertex form is equal to

where
(h,k) is the vertex of the parabola
if
----> the parabola open upward ( vertex is a minimum)
if
----> the parabola open downward ( vertex is a maximum)
In this problem we have

Convert to vertex form

Group terms that contain the same variable, and move the constant to the opposite side of the equation

Complete the square. Remember to balance the equation by adding the same constants to each side.


Rewrite as perfect squares

-------> equation in vertex form
The vertex is the point 

therefore
----> the parabola open upward ( vertex is a minimum)
The range of the function is the interval-------> [-1,∞)

All real numbers greater than or equal to 
see the attached figure to better understand the problem