Let
denote the number of minutes spent brushing his teeth, and let
be the mean and
the standard deviation for this distribution.
The z-score corresponding to this probability is approximately
, which means
Next, (note the sign change)
The corresponding z-score is approximately
, so you have
Solving the two equations for
and
, you'll find that the mean is approximately
and the standard deviation is approximately
.
<span>You would have to wait 318 years for 1/5 (20%) of the Radium to disappear. 1590 is the point where half of the Radium would decay, so if you take 20% of that, it would equate out to 318 years. Radium has a long half life!</span>
Well if the first point is (-2, 1) and the slope is three than the other point would be (-1, 4)
B. D represents the amount of dimes and q represents the amount of quarters so that equals 20 coins total. 0.25q is the amount of quarters multiples by their cost, when added to 0.1d it equals 4.25.
Answer:
See the picture attached.
The shape created is a Triangle.
Step-by-step explanation:
<h3>
The missing part is: "Connect them in order: A to B, B to C, C to D, and then D back to A. What shape is created?"</h3><h3>
</h3>
For this exercise it is important to remember that, given a point 
, "x" is the the x-coordinate of the point and "y" is the y-coordinate of the point.
In this case, Ms. Juhal has the following points:
1) Point 
Where you can identify that:
2) Point 
Where:
3) Point 
Where you can observe that:
4) Point 
Where:
Therefore, knowing the coordinates of each point, you can plot them and connect them in order (Observe the picture attached).
Finally, you can identify that the shape created is a Triangle.
