Regular exercise can help a person lower their resting heart rate. Suppose an individual's resting heart rate, in beats per minute, is modeled by the function f(x) = -0.1x3 + 0.6x2 + 85 after x weeks of regular exercise.
How many weeks of exercise are necessary to lower the individual's resting heart rate below 70 beats per minute?

7 weeks
8 weeks
9 weeks
10 weeks

what do you mean by fog

step-by-step explanation:

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse

2/3

step-by-step explanation:

the slope of a line is equal to the rise/run. in this case the line rises 2 units for every +3 units it moves

i’m here for points.