Answer:
a) 5,000 b) 3,600
Step-by-step explanation:
a) there are four different slots, and for the first three slots there are a possibility for 10 different numbers and in the last slot there can only be 5 different numbers. So you get 10 x 10 x 10 x 5 which leaves you with 5,000 possibilities
b) the same thing as above but know you have fewer numbers 10 x 9 x 8 x5 which gives you 3,600 possibilities
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I'm fairly certain that using that wire you can have the same area no matter what dimensions there are, but if you do the square root, or

of 19,001,900 then you get 4359.11688. So your dimensions are
4359.11688 x 4359.11688. To get area, do length x width to get <span>

.
Hope this helped! If it did, please give me a good rating and mark me brainiest.<span /></span>
7.8335 is a number between 7.833 and 8.834