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?

a. s = 0.5(800)^h

b. s = 800^(0.5)h

c. s = 800^0.5h

d. s = 800^h + 0.5

At a lunchron, guests are offered a selection of five different grilled vegetables and four different meats. in how many waya could one choose three vegetables and two meats?

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

Which of the choices shown could be used to prove that aacp=abcp ?