Answer:
7.142m/s
Step-by-step explanation:
Velocity=change is distance/change in time
change in distance=400m-0m=400m
change in time=56-0=56seconds
v=400m/56s
v=7.143m/s
12. I assume
denotes the complement of A, so

Then by definition of conditional probability,

13. By inclusion/exclusion,

The answer for that would be 20.75
Answer:

Step-by-step explanation:
By definition, we can write ln instead of log. WHEN??
Whenever the base of the logarithm is the number "e".
Hence, when we have:

We can write it in shortcut as:

Hence, ln x can also be written as 
Fourth answer choice is right.
0.02 - 0.2 - 2 - 20 - 200 - 2000 - 20000
All it is doin is moving the decimal point back 1 . so if you keep moving it back the 7th term is 20000
Hope it help