Acompany logo is a red parallelogram. a large version of the logo is painted on a rectangular billboard that has a base of 10 feet and a height of 6 feet. the logo has a base of 7 feet and a height of 4 feet. the rest of the billboard is blue. what percentage of the billboard’s area is red?

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.