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Minchanka [31]
3 years ago
9

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 additiona

l 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.
Mathematics
2 answers:
Evgen [1.6K]3 years ago
7 0

Answer:90cents

Cost of a  10 minute call before 10pm:

37 cents + 9cents*7minutes = 37 cents+63 cents =100 cents

10% of 100cents:

100*10/100= 10 cents

Cost of  the call after 10 pm (i.e with a 10% discount)

100-10= 90 cents

Vinvika [58]3 years ago
4 0

Answer:

  $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

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