Gretchen is using an overhead projector to enlarge a drawing so she can make a poster. the original drawing measures 60 mm wide by 80 mm high. she moves the projector so that the width of the projected image is 300 mm. if the original drawing and the projected image are similar figures, what will be the height of the projected image? a. 225 mm b. 180 mm c. 400 mm d. 440 mm

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Find the quotient. 50a2 – 98b2 -5a +7b

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