Four 4th grade classes are going on a field trip to the aquarium. three classes have 18 students and one class has 10. parents will be driving the students in their own vechicle and each vechicle can hold 5 students.

They will need 13 buses

If you have 18 in three of the classes you will need three buses per class

Each van holds 5 kids divide 18 by 5 you get 3 (plus a remainder we will get back to that later)

and 2 vans for the class of 10

So far we are at 11 buses

But there is that remainder you will need 2 more for them

So that puts us at 13 buses

Hope this helps

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500