SAT Math Practice Question #33929 - SATify | SATify
#33929
applications
functions
exponential
hard
90 sec
A certain radioactive substance decays such that its mass is reduced by half every 15 years. If a sample of this substance had a mass of 240 grams in the year 1950, what was its mass, in grams, in the year 1905?
• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-). • Fractions must be in lowest terms. • Mixed numbers must be converted to improper fractions.
