The energy cost of horizontal locomotion as a func- tion of the body mass of a lizard is given by E = 26.5m-0.34 , where m is the mass of the lizard (in kilograms) and E is the energy expenditure (in kcal/kg/km). Source: Wildlife Feeding and Nutrition. Suppose that the mass of a 5-kg lizard is increasing at a rate of 0.05 kg per day. Find the rate at which the energy expenditure is changing with respect to time

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.