Find the probability. one digit from the number 3,151,221 is written on each of seven cards. what is the probability of drawing a card that shows 3, 1, or 5?

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.