Of the 4 people who have taken their seats at a seminar, 2 have red hair. Considering this data, how many of the next 16 people to take their seats should you expect to be red-haired?

3-12. write each answer with a reasonable number of figures. find the absolute uncertainty and percent relative uncertainty for each answer. (a) [12.41 (±0.09) + 4.16 (±0.01)] x 7.068 2 (±0.000 4) =? (b) [3.26 (±0.10) x 8.47 (±0.05)] - 0.18 (±0.06) =? (c) 6.843 (±0.008) x 104 + [2.09 (±0.04)- 1.63 (±0.01)] =?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.