Allen finds the area of the woods to be 6600 square feet. Why is Allen incorrect?

A: Allen is incorrect because he applied the scale to the sides and then
multiplied the width and the length together.

B: Allen is incorrect because he multiplied the length and the width and then
applied the scale.

C: Allen is incorrect because he did not apply the scale.

D: Allen is incorrect because he used the formula to find perimeter instead of
area.

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.

Select all of the following expressions that are equal to 2.5.

At store a, erasers are sold individually. the cost y of x erasers is represented by the equation y=0.75x. the costs of erasers at store b are shown in the graph.