Answer:
16 minutes
Step-by-step explanation:
If it takes 63 minutes to paint 9 walls then it means for every wall, it takes 63/9=7 minutes
Since it is 4 people working for 7 mins, the individual rate is 4/7 minutes per person
When we have 7 people, then the number minutes they take will be 7*4/7=4 minutes per wall
4 min per wall for 4 walls then total time will be 4*4=16 minutes
Answer:
Slope
0.33
Step-by-step explanation:
Answer:
a) The confidence interval is 
.
Step-by-step explanation:
We have to calculate a confidence interval (CI) of a difference of proportions.
For the existing procedure, the proportion is:
For the new procedure, the proportion is:
To calculate the CI, we need to estimate the standard deviation
For a 90% CI, the z-value is 1.64.
Then, the CI is:
Answer:
Make coordinates with this table.
Step-by-step explanation:
What I think from these tables is that you can make coordinates with these points. Here are the instructions for you to follow-
- See the "y" and "x". These are the axis. So make coordinates with these. Ex- (0,3), (1,5) and so on
- Plot these coordinates in a graph paper.
- After plotting them, you might find the shape it made.
I hope it helps you.
