11) A helicopter flying at 4000 feet begins its descent. It descends at a rate of 500 feet per minute. The function h(m) = 4000 - 500m represents the helicopter's altitude (height above ground) at m minutes
a) What is the altitude at 3 minutes?
b) What is the altitude at 6 minutes?
c) When is the altitude 3000 feet?
d) When is the altitude 500 feet?
e) When would the helicopter reach the ground?

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)