For maximum benefit during exercise, one's heart rate should increase by 50% to 85% above resting heart rate. (a) Alice has a re
1 answer:
Answer:
heart rate during exercise become 126 bpm
Step-by-step explanation:
maximum benefit is when heart beat increased by 50%-85%
alice resting heart rate= 70 bpm
increased heart rate of alice = 80%
increased heart rate =
total heart rate = 70+56=126 bpm
so, the heart rate of alice during exercise become 126 bpm
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Answer:
Step-by-step explanation:
Instead of using the standard form, we can use the vertex form of a quadratic equation:
Where a is the leading coefficient, and (h, k) is our vertex.
Our vertex point is at (2, -4). So, let’s substitute 2 for h and -4 for k:
Now, we need to determine a.
We know that it passes through the point (4, 12). So, when x is 4, y must be 12. In other words:
Solve for a. Subtract within the parentheses:
Add 4 to both sides:
Square:
Solve:
Thererfore, the value of a is 4.
So, our function is:
Now, let’s find our roots. Set the equation to 0 and solve for x:
So, our roots are 1 and 3.
The greater root is 3 and the lesser root is 1.
Therefore, m-n, where m>n, is 3-1 or 2.
Our final answer is 2.