A 78 gram sample of Uranium has a half-life of one year. This means that it loses half of
its mass each year. What is the exponential equation for this situation?

Larger angle: 80 degrees

Smaller angle: 10 degrees

Step-by-step explanation:

complementary angles = two angles that add up to 90 degrees

x = larger angle

x + x - 70 = 90             Add like terms

   2x - 70 = 90                Add 70 on both sides

           2x = 160               Isolate the variable by dividing 2 on both sides

               x = 80

x = larger angle , 80 degrees

x - 70 = smaller angle , 10 degree