Tom's Canoes charges an initial fee of $20 plus $4 an hour to rent a canoe. Jerry's Canoes charges a flat rate of $14 an hour to rent a canoe. For what number of hours can you rent a canoe for the cost to be the same at both companies? Write the equation in the box below. Do not include any spaces in your equation. Equation: Solve the equation. The cost will be the same at hours.

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.