8two smooth pulleys are 8 m apart at the same horizontal level. a light inextensible rope
passes over the pulleys and a box of mass 5 kg hangs at each end of the rope. a third box
of mass mkg is attached to the midpoint of the rope and hangs between the pulleys so
that all three boxes are at the same horizontal level.
the total length of the rope is 16 m. find the value of m.

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.