A city has a mean temperature of 61.3 °F with a standard deviation of 3.7 °F. What is the z score when the temperature is 70 °F?

Lois and clark own a company that sells wagons. the amount they pay each of their sales employees (in dollars) is given by the expression 12h+30w12h+30w where hh is the number of hours worked and ww is the number of wagons sold.

Of four points are collinear, they are also coplanar

What is the quadric regression equation that fits these data