A line passes through the points (−4,n) and (2,4n) and has a slope of 6. What is the value of n? giving 20 points

n= ?

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)