Mckenna collects pokemon cards and had 318 in her collection. She decided to give some to her younger brother so that he can begin his own collection. After giving him the cards Mckenna has 275 cards in her collection determine the percent of change in her collection to the nearest tenth of a present

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

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.

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41