The cost for making a telephone call from Vero beach to Miami is 37 cents for The first 3 minutes and 9 cents per each additional minute. There is a 10% discount for call placed after 10pm. what is the cost of a 10 minute telephone call at placed at 11pm? Round your answer to the nearsest cent.

  $0.90

Step-by-step explanation:

A 10-minute call exceeds the 3-minute initial period by 7 minutes. The initial period charge is 37¢. The additional minute charge is 7·9¢ = 63¢. Then the regular charge for that call is ...

  37¢ +63¢ = 100¢ = $1.00

The 10% discount reduces the charge by ...

  10% × $1.00 = $0.10

so the final cost of the 10-minute call is ...

  $1.00 -0.10 = $0.90 . . . . . cost of the call

1

 The  correct option is  A

2

 The  correct option is  C

3

 The  correct option is  C

Step-by-step explanation:

From the question we are told that

   The proportion of the winning bid from a regular bidder is  

   The proportion of the winning bid from a occasional bidders is  

     The proportion of the winning bid from a first- time bidders is  

    The proportion of  satisfactory jobs done by a regular bidders is

The proportion of  satisfactory jobs done by a occasional bidders is    

The proportion of  satisfactory jobs done by a first- time bidders is  

Generally the probability that a job will be done by a first-time bidder and be satisfactory is mathematically represented as

=>        

=>      

Generally the probability that a job will be satisfactory is mathematically represented as

=>    

Generally given that a job is satisfactory, what is the probability that it was done by a regular bidder is mathematically evaluated as