Experimental and Theoretical Probability.
Help with these 2 questions plz

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Acompany makes steel lids that have a diameter of 13 inches. what is the area of each lid? round your answer to the nearest hundredth