Write the equation of the line TANGENT to the given circle at the given point.1. x2+ y2= 20, (-2,4)

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?