Answer: 0.0775
Step-by-step explanation:
Given : Mean : 
Standard deviation : 
Sample size : 
Since its normal distribution , then the formula to calculate the z-score is given by :-
For x= 28.2 hours
For x= 30 hours
The P- value = 
Hence, the probabiliy that the average time spent stydying for the sampe was between 28.2 and 30 hours = 0.0775
C.) 30h = 180
Since you already have your base all you have to do is find the height
BxH= A
30xH = 180
Fraction=8/20 kids ate a grilled cheese at her restaurant in the last week. This simplifies to 2/5. Therefore the probability that a randomly selected child at her restaurant is eating a grilled cheese is 2/5.
Its 30 . hope this helps u
Answer:
4(x - 2)^2 + 3x – 2 + 1 = 0
Step-by-step explanation:
The equation that has a highest x-power (degree) of 2 is quadratic.
The degrees of the answer choices are ...
So, only the first answer choice is a quadratic.
