If 3 inches of rain fell in 5 hours , how many inches fell per hour?

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236

What makes a trapezoid an isosceles trapezoid?

What is the gcf of 20c^3-5c^4+30c^6