The table shows formulas for the recommended heart rates during exercise for a person who is "a" years old. write and solve a compound inequality to determine the heart rate range for a 16 year old person.

102 ≤ heart rate ≤ 183.6

Step-by-step explanation:

... lower limit ≤ heart rate ≤ upper limit

Put 16 where "a" is and do the arithmetic.

... lower limit = 0.5(220 -16) = 102

... upper limit = 0.9(220 -16) = 183.6

Then the inequality is ...

... 102 ≤ heart rate ≤ 183.6

Comment on the problem

There is nothing to "solve" here. One only needs to evaluate the limits.

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25