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calculusxy
 one year ago
A long distance phone call costs $10.00 for the first ten minutes and $0.75 for each additional thirty seconds. If Andre has $16.65, he can talk for
(A) 13 minutes and 30 seconds
(B) 14 minutes
(C) 14 minutes and 30 seconds
(D) 15 minutes
(E) 17 minutes and 30 seconds
calculusxy
 one year ago
A long distance phone call costs $10.00 for the first ten minutes and $0.75 for each additional thirty seconds. If Andre has $16.65, he can talk for (A) 13 minutes and 30 seconds (B) 14 minutes (C) 14 minutes and 30 seconds (D) 15 minutes (E) 17 minutes and 30 seconds

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calculusxy
 one year ago
Best ResponseYou've already chosen the best response.1@phi @jim_thompson5910

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1were you able to set up the equation?

calculusxy
 one year ago
Best ResponseYou've already chosen the best response.1I have \[$10 + $0.75x = $16.65\] I am not sure if that's correct

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1good, where x is the number of 30 second intervals (after the 10 minutes are used up)

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1solve for x to get x = ??

calculusxy
 one year ago
Best ResponseYou've already chosen the best response.1It's like a decimal that can be rounded to 8.87

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1let's make x a whole number so round that down to x = 8

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1we don't round up to x = 9 because then we'd go over budget

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1if x = 8, then he can talk an additional 8*30 = 240 seconds = 4 minutes

calculusxy
 one year ago
Best ResponseYou've already chosen the best response.130 x 9 = 270 seconds

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1no, like I said, we can't bump up to 9 because we'd go over our budget

calculusxy
 one year ago
Best ResponseYou've already chosen the best response.1i meant to put 30 x 8

calculusxy
 one year ago
Best ResponseYou've already chosen the best response.1240 seconds / 60 seconds = 4 minutes 14 minutes

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1yep, 14 minutes is the final answer
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