A department store buys 300 shirts at a cost of $2,100 and sells them at a selling price of $10 each. Find the percent markup

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Match each statement with its corresponding value for the system below: y = -2(3)x and y = 9x - 2 1. the number of points of intersection. -2 2. the x-coordinate of the solution. 1 3. the y-coordinate of the solution. 0

What is the perimeter of trapezoid jklm? + units 2 + + units 9 + units 9 + + units