Corey ate a chocolate candy bar that he got for valentine’s day. he ate 4/10 of the candy bar on monday. on tuesday he ate another 3/10 of the candy bar. how much of the candy bar has corey eaten? show your solution with a visual model, numbers and / or words .

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?