The measure of a leg of an isosceles triangle is twice the measure of its base. If the perimeter of the triangle is 64 units, what is the measure of the base of the triangle?
PLEASE HURRY
A. 5.7 units
B. 12.8 units
C. 16.0 units
D. 21.3 units

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