$40/12 = unit rate simplify = 10/3
$10/3 per book
18 * 10/3 = $60 for 18 copies
Z score ( X = 1890 ): 1.31
Z score ( X = 1230 ): -0.76
Z score ( X = 2220 ): 2.34 (This value of Z is unusual )
Z score ( X = 1360 ): -0.35
<u>Step-by-step explanation:</u>
Here we have , A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1473 and the standard deviation was 318 . The test scores of four students selected at random are 1890 , 1230 , 2220 , and 1360 . We need to find Find the z-scores that correspond to each value and determine whether any of the values are unusual. Let's find out:
We know that Z score is given by : ( data - Mean ) / ( standard deviation )
Z score ( X = 1890 ):
⇒
Z score ( X = 1230 ):
⇒
Z score ( X = 2220 ):
⇒
This value of Z is unusual as Value lies as : .
Z score ( X = 1360 ):
⇒
Answer:
It's A don't listen to the other guy
Step-by-step explanation:
Answer:
mineeeeeeeeeeee
Step-by-step explanation:
16cos(28). Type that in like last time.