Answer:
approx. 3.6667 miles per minute
Step-by-step explanation:
1 hour = 60 minutes
1 hour or 60 minutes => 220 miles
1 minutes => 220 / 60 miles
4 to 3
4:3
4/3
ratios can be explained in only 3 ways: with the word to, with a colon (:), and with a fraction bar (/)
You have 7 numbers, two numbers 4 , one 5, one 6 and three numbers 7.
From these 7 numbers you can create

phone numbers, but they are not all different.
If you have two numbers 4, then you have to divide obtained number by 2! (the number of all possible permutations of two numbers 4) and since you have three numbers 7 you should divide the obtained number by 3! (<span>the number of all possible <span>permutations of three numbers 7</span>). Then</span><span /><span>
</span><span>
</span><span>

.</span>
Answer: You can create 420 different phone numbers.<span />