a projectile is fired at an upward angle of 45 degress from the top of a 265 m cliff with a speed of 185 m/s what will be its speed when it strikes the fround bellow conservation of enegery

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.