1800×6.5%×30=b
b-1800=a
a) $1,710
b) $3,510
There are 4 possibilities of a right choice. Your Aunt has 1 favorite. So you probability would be 1/4 or .25
Hope This Helps and God Bless!
Start with expression 
1. Separate terms - with x leave in left side, without x write in right side:

2. Divide the last expression by a (
):

Answer: this statement is true when
.
the formula for volume of a prism is base x height