Mathematic 12 don’t understand

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap