Martha has 5 dogs and 4 cats. She takes each animal separately for a daily walk. She can take the animals for a walk to the park or to the barber shop. How many different options for a walk with a single animal does Martha have?	Choose the correct answer
A) 8 B) 9 C) 10 D) 18 E) 20
5 dogs, 4 cats; park/barber shop   1 dog - 2 options - either park or barber shop, so, 5 dogs - 10 options and 4 dogs - 8 options.   Total = 18 options.   ANS:18
<result>D</result>
Martha has 5 dogs and 4 cats. She takes each animal separately for a daily walk. She can take the animals for a walk to the park or to the barber shop. How many different options for a walk with a single animal does Martha have?