Answer:
5=4.50 6= ? 7= -3/8
Step-by-step explanation:
Answer:
y =52
Step-by-step explanation:
We know that the angles 4x and 5x make a straight line
4x+5x = 180
9x = 180
Divide by 9
9x/9 = 180/9
x = 20
The three angles of a triangle make 180
y + 48 +4x = 180
y + 48+4(20) =180
y + 48 +80 = 180
Combine like terms
y +128 = 180
Subtract 128 from each side
y + 128-128 = 180-128
y =52
Answer:
The z-value rounded to the nearest hundredth is -1.64
There is no enough evidence to reject the claim.
Step-by-step explanation:
A certain website claims that it averages 4.7 hours of downtime per month.
No. of samples = n = 17
Mean =
Standard deviation =
Formula:
Z =−1.64
Z critical at 90% is 1.65
Since Z calculated < Z critical
So, there is no enough evidence to reject the claim.
The prediction of the editor is not correct
Step-by-step explanation:
Step 1 :
Given,
Percentage of email that comes back undelivered = 3%
Number of email the editor sends out = 12181
Number of email predicted by the editor which is undelivered = 433
Step 2 :
To compute the actual number of emails undelivered we need to compute 3% of the emails that is actually sent.
= 3% of 12181 = 0.03 * 12181 = 365.43 which is 366 rounded to the closest integer.
Step 3:
Hence we can conclude that the prediction of the editor is not correct as only 366 undelivered notices are received back as against his prediction of 433 notices.