The first letter can be any one of the 26 letters in the alphabet. For each one . . .
The second letter can be any one of the 25 remaining ones. For each one . . .
The third letter can be any one of the 24 remaining ones. For each one . . .
The fourth letter can be any one of the 23 remaining ones.
Total possible 4-letter codes = (26 x 25 x 24 x 23) = <em>358,800 </em>
Answer:
look at the attachment (p.s you could also use desmos to find the vertex)
Without the table I will guess 5 is common to all 3 they are proportional
You have to cut 15 pounds into 3.75 four times
