The length of a rectangle is six times its width. if the perimeter of the rectangle is 140 yd , find its area.

Suppose the probability of selling a car today is 0.28. find the odds against selling a car today.

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

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.