Answer:
Step-by-step explanation:
a
The answer is associative property
I have the answer for the first question, the second one idk how to do. To solve mean add all the numbers and divide by how many there are. 300/5 = 60 so that is the mean. For standard deviation subtract mean from every number in the list and square it. 225, 100,0, 25, and 225. Average these numbers and you will get the standard deviation of 115. Im sorry I cant do the second question but I hope this helped for the first one.
A) one task takes
hours
B) 1 hour robot can do
tasks.
<u>Solution:</u>
Given, A robot can complete 8 tasks in three fifths hour.
Each task takes the same amount of time.
We have to find the following
<em><u>A.)How long does it take the robot to complete one task</u></em>
From given information,
8 tasks ⇒ 3/5 hour
Then, 1 task ⇒ “n” hours
So, by chris cross method,

So, one task takes
hours.
<em><u>B.)How many tasks can the robot complete in one hour</u></em>

So, in 1 hour robot can do in
tasks.