Answer:

And we can assume a normal distribution and then we can solve the problem with the z score formula given by:

And replacing we got:


We can find the probability of interest using the normal standard table and with the following difference:

Step-by-step explanation:
Let X the random variable who represent the expense and we assume the following parameters:

And for this case we want to find the percent of his expense between 38.6 and 57.8 so we want this probability:

And we can assume a normal distribution and then we can solve the problem with the z score formula given by:

And replacing we got:


We can find the probability of interest using the normal standard table and with the following difference:

6 - 3 = 3
-2 - (-9) = 7
(3 , 7)
420-17%= 348.6
This is it because she read 420 pages during the summer but then she reads 17% less which is subtracting then get the answer which is 348.6
Answer:
6/7
Step-by-step explanation:
If you want the slope of the line on a graph when x is the independent variable, then solve for y:
-28y = -24x +14 . . . . . . . . . . . subtract the x-term
y = (-24/-28)x +14/(-28) . . . . . divide by the y-coefficient
y = 6/7x -1/2
The "rate of change" is the coefficient of x, 6/7.
Answer:
6.907
Step-by-step explanation: