Một lô hàng thịt đóng gói có tỉ lệ nhiễm khuẩn là 1,6%.Kiểm tra lần lượt ngẫu nhiên 2000 gói hàng này tính xác suất có đúng 36 gói thịt bị nhiễm khuẩn

Could someone with number 1 and 2

9/10 divide by -3/15 as a mixed number

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)