<u>Answer: </u>
The car’s rate in kilometer per minute is 1.2 kilometer/minute and in 20 min it can travel 24 kilometer
<u>Solution: </u>
It is given that it can travel 72 kilometer per hour.
We know 1 hour = 60 min
So, the car travels in
60 min = 72 hour
Thus the cars rate in kilometer per minute is is 1.2 kilometer per minute.
Now we know in 1 minute the car can travel 1.2 kilometer.
Therefore in 20 minutes it will travel 1.2 20 kilometers= 24 kilometers
Trial and error specifies that you should guess the value of m and see if you aimed too low too high then adjust your next guess based on that.
Suppose we don't already know what m is (even though it is completely obvious), let's pick m to be 6,
So we check, but
which means m must be bigger.
So we pick m to be 8 and check, but
which means m must be smaller.
Since only natural number between 6 and 8 is 7 we pick m to be 7 and check, and
.
The answer is therefore 7.
Hope this helps :)
The value of is 720
The expression is given as:
The permutation formula is:
So, we have:
Evaluate the difference
0! = 1.
So, we have:
Evaluate the factorial
Hence, the value of is 720
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