A cube has an edge length of 21 cm. Use an exponent to express its volume. There are three answers idk what to choose

21*21*21

21^3

21 * 3

Given abcd ac=38 and ae=3x+4 find the value of x

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

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