Natalie is a salesperson. She sold a cell phone for $98 and earned 20% commission. How much commission did Natalie earn?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

What is negative 3/9 times negative 2/8 ?