3. Scientists determined that the rate y (in calories per minute) at which you use energy while walking can be modeled by y=0.00849(x-90.2)2 +51.3 where x is your walking speed (in meters
per minute). What speed minimizes energy use? (90.2, 51.3)

The two after the parenthesis should be an exponent

Find the value of x for which the lines are parallel.

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212

What is the distance between a and b? round your answer to the nearest tenth. a coordinate plane is shown. point a is located at negative 1, 5, and point b is located at 4, 1. a line segment connects the two points.