(2.5 x 104) – (1.4 x 10')
A) 2.36 x 104
B) 2.48 x 104
C) 23.6 x 103
D) 1.1 x 101

Could somebody me with this radical simplification?

What is the difference between the equations of a vertical and a horizontal line?

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad