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3 years ago

15

Todd is 30 years old. If his target heart rate during aerobic activity is 60-90 % of his maximum heart rate, how fast should his

heart beat during exercise (in beats/min)?

1 answer:

sergeinik [125]3 years ago

6 0

Answer:

Step-by-step explanation:

It is given that Todd is 30 year old and he perform aerobic activity that may increase his heart beat.

maximum heart beat can be calculated by subtracting the age from 220

For 30 year old male Maximum heart beat

=220-30=190

And during exercise his heart beat increases to 60-90 % of maximum value

60 % of 190=114 beats/min

90 % of 190=171 beats/min

So Heart beat can goes up to 114 - 171 beats/min

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3(9z+4) > 35z - 4<br> What is z

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2 years ago

For the following linear system, put the augmented coefficient matrix into reduced row-echelon form.

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Answer:

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Step-by-step explanation:

We will solve the original system of linear equations by performing a sequence of the following elementary row operations on the augmented matrix:

Interchange two rows
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You need to follow these steps:

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Subtract row 1 from row 2 $\left(R_2=R_2-R_1\right)$

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Subtract row 1 multiplied by 5 from row 3 $\left(R_3=R_3-\left(5\right)R_1\right)$

$\left[\begin{array}{cccc}1&3/2&-1/2&7\\0&1/2&3/2&-3\\0&3/9&9/2&-28\end{array}\right]$

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Subtract row 2 multiplied by 3 from row 3 $\left(R_3=R_3-\left(3\right)R_2\right)$

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Multiply row 2 by 2 $\left(R_2=\left(2\right)R_2\right)$

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