first of all make a diagram write 20 and circle that and make a line write their 2× 10 and circle 2 and again make a line and write 2× 5 and make a circle and write 20= 2,2,5
The company will have to produce at least 650 products each week to achieve 7800 products in 12 weeks
(7800 products divided by 12weeks = 650 products per week)
When you have two lines in an x shape, vertical angles are the ones opposite each other.
in the example here, the angles with the purple dots are vertical angles and the angles with the blue dots are the other vertical angles