Help plz you Smart people

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

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Agarden consists of an apple tree, a pear tree, cauliflowers, and heads of cabbage. there are 40 vegetables in the garden. 24 of them are cauliflowers. what is the ratio of the number of cauliflowers to the number of heads of cabbage?