The difference between combinations and permutations is ordering. With permutations we care about the order of the elements, whereas with combinations we don't. For example, say your locker “combo” is 5432. If you enter 4325 into your locker it won't open because it is a different ordering (aka permutation).
(On google)
Both your answers in blue are correct. The first question posted, when flipped and multiplied, much cancels out leaving :
Answer:
c
Step-by-step explanation:
Feet is the plural of a foot and there are 12 in. In a foot
Answer:
The cost per kilometer was $2.25
Step-by-step explanation:
<u><em>The correct question is</em></u>
Emanuel was charged $32 for a 14 2/9 km
What was the cost per kilometer?
To find out the cost per kilometer (unit rate) divide the total cost by the total kilometers
<em>Convert mixed number to an improper fraction</em>

<em>Find the unit rate</em>

therefore
The cost per kilometer was $2.25