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notka56 [123]
3 years ago
6

Please answer and give an explanation!! 22 Points!!

Mathematics
1 answer:
Andrej [43]3 years ago
3 0

Filling in 16 for <em>a</em>, we have ...

... lower limit ≤ heart rate ≤ upper limit . . . . . . . this is the meaning of upper and lower limits

... 0.5×(220 -16) ≤ heart rate ≤ 0.9×(220 -16) . . . . . substitute given expressions

... 0.5×204 ≤ heart rate ≤ 0.9×204 . . . . . . . . . . . . . begin expression evaluation

... 102 ≤ heart rate ≤ 183.6

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