The half-life of sodium-22 is 2.6 years. A sample contains 800 mg of this isotope. Which expression represents the mass of sodium remaining after h half-lives?

S = 0.5(800)h

S = 800(0.5)h

S = 8000.5h

S = 800h + 0.5

An appliance salesman sets a goal to sell an average of 6 appliances per day for the first two weeks of his new job. the dot plot shows the number he sold each day during the first 13 days. what is the minimum number of appliances he must sell on the 14th day in order to reach his goal? a) 5 b) 6 c) 7 d) 8

Tan198=asin164=? how to solve this? ?

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i