Answer:
218.25 seconds
Step-by-step explanation:
54.73
54.56
54.32
54.54
+_____
218.15
The second result is more precise because it's in millilitre,so if the first were to be fully precise,it should have been 78.6 cm.
Hope this helps!
Answer: 66%
Step-by-step explanation:
I took the test on khan.
Answer:
20 miles per hour
Step-by-step explanation:
Given that the train left for London, and after 9 hours later, a car traveling 80 miles per hour tried catching up to the train. After 3 hours, the car caught up
Which means that the car travelled the same distance in 3 hours as the train travelled in 9 + 3 = 12 hours
Let the distance be d
Given the speed of car is 80 miles per hour
We know that 

d = 240 miles
Now for the train Average speed = total distance / total time taken
Average speed of the train =
= 20 miles per hour
0.503, 0.529, 0.53 would be the answer