Supposed the first friday of a new year is the fourth day of that year .will the year have 35 friday regardless of whether or not it is aleap year

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 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)

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'