Question: For security, a credit card number is coded in the following way, so that it can be sent as a message. Subtract each digit from

For security, a credit card number is coded in the following way, so that it can be sent as a message. Subtract each digit from 9.

a)Code the credit card number 3201 2342 3458 0931.

b) A coded credit card number is 2341 0135 7923 0133. What is the original credit card number?

c)Findf(x)ifXrepresents a single input digit. What is the domain off(x)?

d)Findf-1(x). What is the domain off-1(x)?

2.The sum of two numbers is 28. Find the numbers if the sum of their squares is a minimum?

3.Bob and Jack enter a 1000 km bicycle race. Bob cycles 4 km/h faster than Jack, but his bicycle gets a flat tire, which takes 30 minutes to repair. If both of them finish the race in a tie, then how fast was each boy cycling?

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