A rectangular garden is fenced on all sides with 246 feet of fencing. The garden is 7 feet longer than it is wide. Find the length and width of the garden.
(w + 7) feet=top w=side

The length of the garden is
feet.
The width of the garden is
feet.

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.