6.) The population, P, of a new town is modelled by the formula P = t3 - t2 + 25t + 10 000, where t is measured in years. t is set at 0 in the year 2000.
.
Use the formula to predict
a) The population in the year 2010
b) The rate of population growth in 2010.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.