The Gateway Arch in St. Louis, Missouri, weight about 20,000 tons. Write an amount that could be the exact number of tons the Arch weights.

A video store has 27 new release movie posters. How many ways can the manager choose a group of 4 for a prize?

In the circle below find ACD

Imagine having 20 currency notes, consisting of $5 bills, and $10 bills that total $125. Write a system of equations to describe the situation.

2 root 50 + 3 root 32 + 4 root 18

An assembly line with 10 tasks needs be designed. The total time for all tasks is 16 minutes. If you need to produce 30 units/hour, how many minimum work stations will be needed

Emily catches the school bus at 7:45 am she needs 30 minutes to get dressed 15 minutes to eat breakfasts, an 10 minutes to walk to the school bus. What latest time Emily can awake in the morning to get to the bus on time?

Find a primitive Pythagorean triple other than (3, 4, 5).

The price of one share or acme company declined $5 per day for 4 days un a row. How much did the price of one share change in total after the 4 days?

The measures of the angles of triangleDEF are in the ratio 2:4:4. What are the measures of the angles

In how many ways can 8 persons be seated in a row