My brain is not functioning...i mainly need the answers to d and f but the others would be great!

If 20% of a number is 35, what is 50% of that number?

The frequency table shows a set of data collected by a doctor for adult patients who were diagnosed with a strain of influenza. patients with influenza age range number of sick patients 25 to 29 30 to 34 35 to 39 40 to 45 which dot plot could represent the same data as the frequency table? patients with flu

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12