The graph shows the relationship between James’s resting heart rate and the number of hours he exercises per day. For every hour
of exercise, James’s resting heart rate decreases by about (1,5,15,20) beats per minute. His resting heart rate is about (50.5, 70, 77.5,82.5) beats per minute when he exercises 4 1/2 hours a day.
2 answers:
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Answer:
(C)81
Step-by-step explanation:
Total Number of Students =300
Percentage who had cats, n(C) = 40%
Percentage who had both cats and dogs , = 12%
Percentage who had neither cats nor dogs, =45%
Now:
Universal Set,
Therefore:
Number of Students who had dogs
=27% of 300
=81