Instructions: Use algebraic techniques to solve problems, unless otherwise instructed. Show the calculations leading to your answers (except basic algebra, arithmetic), when there is work to show. Simplify and circle your final answers 1. (18 pts.) In the vicinity of a bonfire, the temperature 7 (in C) at a distance x meters from the center of the fire is described by T( x ) = 500,000 x2 + 400 (a) What is the average rate of change of 7 between 0 and 10 meters? Also, what is the interpretation of this average rate of change? Use correct units in your interpretation. 10 A