Q: The pet shop grooms dogs. It takes 30 minutes to groom a poodle. It takes half as much time to groom a terrier as it takes to groom a poodle. They do not groom cats. If the pet shop grooms 3 poodles and 8 terriers, what is the total length of time it will take, in minutes?
A: At a rate of 30 minutes per poodle, 3 poodles will take 3 * 30 = 90 minutes. If it takes half as much time to groom a terrier as it takes to groom a poodle, it takes 30 / 2 = 15 minutes per terrier. At a rate of 15 minutes per terrier, 8 terriers will take 120 minutes. Thus, in total, it will take the pet shop 90 + 120 = 210 minutes to groom 3 poodles and 8 terriers. The answer is 210.

Q: Grant has four times as many vacations as Kelvin has classes. If Kelvin has 90 classes, how many vacations and classes do Grant and Kelvin have altogether?
A: Grant has 4 * 90 = 360 vacations. In total, they have 360 + 90 = 450 vacations and classes. The answer is 450.

Q: Lanie has been sick and was only able to work 4/5 of her usual 40-hour week. If her hourly rate is $15, how much was her salary for that week?
A:
Lanie was only able to work for 40 * 4 / 5 = 32 hours in that week. Thus, her salary was 15 * 32 = $480. The answer is 480.