At the park there is a pool shaped like a circle with radius 12yd. a ring shaped path goes around the pool. it's width is 5yd. we are going to give a new layer of coating to the path. if 1 gallon of coating can cover 4 yd^2, how many gallons of coating do we need? note that coating comes only by the gallon, so the number of gallons must be a whole number. (use the value 3.14 for pi)

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

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.