The radius of the circle, measured in centimeters, is given by r(t)=6−5t2+1, where t is time measured in hours since a circle of a 1-cm radius of the bacterium was put into the cult...The radius of the circle, measured in centimeters, is given by r(t)=6−5t2+1, where t is time measured in hours since a circle of a 1-cm radius of the bacterium was put into the culture. Use the INTERSECT feature on a graphing calculator to determine the number of skateboards that must be sold for a worker to earn a monthly income of $1400. (Hint: Find the intersection of the function and the line y=1400.)
