Answer:
Step-by-step explanation:
rate of change of power\[ =\frac{H(100)-H(80)}{100-80} \]\[=\frac{(0.003(100)^2+0.07(100)-0.027)-(0.003(80)^2+0.07(80)-0.027)}{20} \]\[=\frac{0.003(10000-6400)+0.07(100-80)}{20}\]\[ =\frac{10.8+1.40}{20} \]\[=\frac{12.2}{20}\]\[=0.61[/tex]\]
