Loading...

#35045

applications

polynomials

functions

hard

90 sec

The efficiency $E (s)$ , in percentage, of a certain machine is modeled by the function $E (s) = - 0.01 (s - 150)^{2} + 95$ , where $s$ is the operating speed of the machine in revolutions per minute (RPM). At what operating speed does the machine achieve its maximum efficiency, and what is the sum of this optimal speed and the maximum efficiency?

• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-).
• Fractions must be in lowest terms.
• Mixed numbers must be converted to improper fractions.