Answer/Step-by-step explanation:
An equation that describes the relationship can be written as
.
Using the two sets of coordinates, (2, 140) and (4, 280), calculate the slope (m) as shown below:

Substitute m = 70 into 
The equation would be:

This equation can be interpreted as follows:
The heart's resting rate is 70 beats each minute.
slope = 13
the slope of the tangent is f'( 4)
given f(x) = x² + 5x , then f'(x) = 2x + 5
and f'(4) = ( 2 × 4 ) + 5 = 13
9h + 15 > 55
- 15 - 15
9h > 40
h > 40/9
h > 4.44444.
any number greater than 4.44444
Answer:
by using kinetic and potentail energy