Answer:
Probably 128 km/h, but maybe 98.5 km/h. See below.
Step-by-step explanation:
What does "at the same time" mean?
If it means that he covered the 240 km in the same time as he convered the 80 km, then this is how you solve it:
80 km in 1.25 hour
240 km in 1.25 hour
Total distance: 80 km + 240 km = 320 km
Total time: 1.25 hour + 1.25 hour = 2.5 hour
average speed = (total distance)/(total time) = 320 km / 2.5 hour = 128 km/h
If it means he covered the 240 km in the same time he covered the 80 km plus the rest, then this is how you solve it:
80 km in 1.25 hour
240 km in 1.25 hour + 45 min = 240 km in 1.25 houir + 0.75 hour = 240 km in 2 hour
Total distance: 80 km + 240 km = 320 km
Total time: 1.25 hour + 2 hour = 3.25 hour
average speed = (total distance)/(total time) = 320 km / 3.25 hour = 98.5 km/h
The correct answer is y = 1.5x, A.
I am sure it is because I took the K12 test. I used the answer from the other person that answered this, and got it wrong. I reviewed the test, and It says that 1.5x is correct.
Answer:
4.25 hours
Step-by-step explanation:
38.25/9
Answer:
Answer : 1,2,3,5,6,10,15,25,30,50,75,150, Related Links : Is 150 a rational number?
Step-by-step explanation:
The factors of 150.
Answer: If p=0.19, then to update this study, the files of 98 public accountants should be studied.
If no prior estimate of the population proportion is given then to update this study, the files of 271 public accountants should be studied.
Step-by-step explanation:
As per given , we have
Margin of error : E = 0.05
Critical value for 90% confidence :
Prior estimate of population proportion: p= 0.19
Formula for sample size :
∴ To update this study, the files of 167 public accountants should be studied.
If no prior estimate of the population proportion is given , then
we take p= 0.05
Required sample size :
∴ To update this study, the files of 271 public accountants should be studied.