Answer:
4t-20
Step-by-step explanation:
Answer:
The z-score associated with the upper boundary of of this price range is -0.25.
Step-by-step explanation:
It is provided that the board of directors for Cosmic Coffee wants to know the price range for the lowest 40% of drink sales.
If <em>X</em> represents the price range of drink sales, then
P (X < x) = 0.40
Consider that <em>X</em> follows a Normal distribution.
To compute the probability of a normally distributed random variable we need to first convert the raw score to the <em>z</em>-scores.
The formula to <em>z</em>-score is:

Then,
P (X < x) = 0.40
⇒ P (Z < z) = 0.40
The value of <em>z</em> for this probability is:
<em>z</em> = -0.25
*Use a <em>z</em>-table.
Thus, the z-score associated with the upper boundary of of this price range is -0.25.
Answer:
First, add, subtract, multiply, or divide within the parenthesis (if there are parenthesis). Then, you do the exponents. After that, you multiply and divide left to right. Finally, you subtract left the right.
Step-by-step explanation:
Order of Operations is also known as PEMDAS or Parenthesis, Exponents, Multiply, Divide, Add, Subtract. It means if we have an equation that is:
5 + 6 x 2, we do not add first. We multiply first, so we do 6 x 2, which gives us 12. 12 + 5 = 17 and that is your answer.
I hope that this helps! :)
Answer:
B : 1.8 hours a day.
Step-by-step explanation:
For 5 days she practices for 4 hours.
Subtract the 4 hours by the combined 13 hours.
Divide the remainding 9 hours of video game time by the 5 days.
Answer:
Step-by-step explanation: