1. The product of a number and four more than the number is 12 find the two numbers

2. The length of rectangle is 1 cm less than three times the width. If the are of the rectangle is 30 cm^2, find the dimensions of the rectangle

3. You throw a rock straight up form a cliff that was 24 ft above the water. If the weight of the rock, h, in feet, after t seconds is given by the equation h =-16t^2+20t+24, how long will it take for the rock to hit the water? (hint: set h to 0 and solve with the quadratic formula)