91Ó°ÊÓ

List all positive integer factors of each number. $$ 36 $$

Evaluate. $$ 277 \div 1000 $$

The polynomial equation $$ y=-0.0545 x^{2}+5.047 x+11.78 $$ gives a good approximation of the age of a dog in human years y, where \(x\) represents age in dog years. Each time we evaluate this polynomial for a value of \(x,\) we get one and only one output value y. For example, if a dogs is 4 in dog years, let \(x=4\) to find that \(y=31.1\) (lirify this, This means that the dogs is about 31 yr old in human years. This illustrates the concept of a function, one of the most important topics in mathematics. It used to be thought that each dog year was about 7 human years, so that \(y=7 x\) gave the number of human years for \(x\) dog years. Evaluate \(y\) for \(x=9,\) and interpret the result.