<human>:  Hannah has three dogs. The first dog eats 1.5 cups of dog food a day. The second dog eats twice as much while the third dog eats 2.5 cups more than the second dog. How many cups of dog food should Hannah prepare in a day for her three dogs?
<bot>: How many cups of dog food does the second dog eat? ** The second dog eats 1.5 x 2 = <<1.5*2=3>>3 cups of dog food.
How many cups of dog food does the third dog eat? ** The third dog eats 3 + 2.5 = <<3+2.5=5.5>>5.5 cups.
How many cups of dog food should Hannah prepare in a day for her three dogs? ** So, Hannah should prepare 1.5 + 3 + 5.5 = <<1.5+3+5.5=10>>10 cups.
#### 10