posted by jenny on .
A band poster that measures 90 cm by 40 cm is reduced by a scale factor of 1/6 so it can fit on a postcard.
a) What are the dimensions of the postcard image?
b) By what scale factor, to the nearest hundredth, was the area of the poster decreased in the reduction process?
a. Dimensions=90/8 by 40/8 = 11.25cm by 5cm.
b. A2/A1 = (11.25*5)/(90*40) = 64.