When is etimation an effective way to determine an answer

Action movies make up 85 percent of devon 's movie collection. if he has 20 movies, how many action movies are in Devon's collection?

Sarah earns $20 a day working after school. She spent 30% of her daily earnings on Monday. How much money did she spend on Monday?

You need four pieces of string that are 2.25 feet long to make bracelet. you have 20 feet of string. estimate how much string you need to make a bracelet

What is the shape and volume of solid

What is the elapsed time 1:24pm to 4:47 pm

What are the next two terms in the sequence: - 16, 8, - 4, 2

Raise a to the 9th power, then find the quotient of the result and b

Troy cut a 100 foot rope into 3 pieces. The first piece is 43 foot long. The second piece is at least 22 feet long, but no greater than 33 feet long. Which inequality represents the length (x) of the third piece?

How do you solve 3 (1+5)

How many different ways can you find of writing 1/2