Which property justifies this statement? 2+(8 + 9) = (2 + 8) +9
a. transitive
b. commutative
c. distributive
d. associative

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

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.

Robin and john each a a 12 inch pizza about how many square inches of pizza did they eat? estimate how much pizza they ate