Ihave a 99.56% in math right now. i got a 50% on an assignment that's worth 50% of my total grade. what will that bring my grade in math down to?

Cindy uses 1-inch cubes to find the volume of a jewelry box shaped like a rectangular prism. she uses 780 cubes to completely fill the jewelry box with no gaps or overlaps. if the jewelry box is 13 inches long and 5 inches wide, how tall is cindy’s jewelry box?

In the diagram of circle o, what is the measure of zabc?

If the probability of an event happening is 65% then the probability this event does not occur?