A 6 character computer password is made up of 4 numbers followed by 2 letters. How many different passwords are possible? a. 810
2 answers:
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Answer:
The fourth one
Step-by-step explanation:
Surface area of a cylinder:
where r = radius and h = height
We have a given height of 14cm and a given diameter of 6cm
We need the radius, not the diameter
To convert diameter to radius we simply divide by 2
6 / 2 = 3
so R = 3
We now plug in the given values into the formula
This equation matches with answer choice D