Last month a phone company charged $ 0.07 per minute for the first 300 minutes of calling time and $0.05 per minute for each minute of calling time in excess of the first 300 minutes . for how many minutes of calling time was bob charged by the phone company last month? 1) last month the phone company charged bob $21.00 for his calling time that was charged at $0.07 per minute.2) last month the phone company charged bob $40.00 for his calling time that was charged at $0.05 per minute.

1) 300 min

              2) 680 min

Step-by-step explanation:

1) As the charge was $21 at 0.07, x is the minutes he used, we have:

0.07x = 21

x = 21/0.07

x = 300

2) As the charge was $40 and the company charges different rates for minutes, we know from 1 that the first 300 min costs $21, we have

40 - 21 = 19

So $19 was charged with the $0.05 fee. so:

0.05x = 19

x = 19/0.05

x = 380

300 + 380 = 680 min

13.33%

say 50 oranges, then 100 apples

80 are red, 20 are yellow

total fruit = 150

20chances out of 150 for yellow

20/150 = 13.33%