By lunch time, penelope's mom completed 40% of her to-do list. if she completed 6 tasks, how many total tasks does she have on her to-do list?

How does reflecting or rotating a figure change the interior angles of the figure?

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

There are 8 movies that you would like to see currently showing in theatres. in how many different ways can you choose a movie to see this saturday and one to see this sunday?