The numbers between 30 and 40 whose only factors are one and themselves, also called prime numbers, are 31 and 37.<span> Prime numbers are useful in generating numerical passwords or codes that are difficult to crack. so A) is the answer
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Answer: -38
Step-by-step explanation:
First he would have to walk back 19 steps to get back to his orginal position, then he would have to further go back another 19 steps.