When playing their favorite game bobby scored 139,750 points while alex scored 99,190 points. which of the following is the best estimate of how many more points bobby scored then alex?

a. 410,000
b. 59,000
c. 41,000
d. 5,900

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.