Help will give brainliest if correct

What is the volume of a rectangular prism if the length is 10.4 mm the width is 5 mm in the height is 8 mm

Abag contains 3 red marbles 4 white marbles and 5 blue marbles if one marble is drawn from the bag what is the probability that the marble will be blue

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?