How do i solve 2x³a³ over 5x⁻³a² multiplied by 5x⁻⁴a over 3x²a⁻⁵ ?

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Ou have a 20-ounce bottle of juice. you pour out 14 of the bottle to share with a friend. if you pour out 3 ounces for yourself, what fraction of the 20 ounces will be left in the bottle? clear check 35 25 12 1320

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?