Cary calculated the surface area of a box in the shape of a rectangular prism. She wrote the equation 74-6
148 = 2(6w+bh+hw) to represent the width and height of the box. She solved for w and got W= h+ 6
Which of the
following is an equivalent equation?
W=
148-6
12+
148-12
W=
12+2h
w=136-14h
W= 136-10h

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.