SAT Math Practice Question #38218 - SATify | SATify
#38218
data analysis
exponential
medium
90 sec
Calculator OK
A certain radioactive isotope decays over time. The mass M, in grams, remaining after t years is given by the equation M=800(0.96)t. What is the annual percentage rate of decay of the isotope? (Express your answer as a percentage, without the percent symbol.)
• 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.
