You want to buy a jacket that is on sale for $59.95, including tax. If you are paid $10.00 an hour for babysitting, how many hours will you have to babysit in order to earn enough money to pay for the jacket? You are paid to work only by the full hour.

The vector a? is 3.50 cm long and is directed into this page. vector b? points from the lower-right corner of this page to the upper-left corner of this page and has the components bx=-19.5 cm , by=25 cm. in the right-handed coordinate system, where the +x-axis directed to the right, the +y-axis toward the top of the page, and +z-axis out of the page, find the x-component of the vector product a? ×b? , measured in cm2.