Problem 1: the accompanying data describe flexural strength (mpa) for concrete beams of a certain type. calculate a point estimate for the mean value of the strength of the population of beams manufactured in this fashion. 9.2 9.7 8.8 10.7 8.4 8.7 10.7 6.9 8.2 8.3 7.3 9.1 7.8 8.0 8.6 7.8 7.5 8.0 7.3 8.9 10.0 8.8 8.7 12.6 12.3 12.8 11.7

Give all possible names for the line shown. calculation tip: lines can be written with either point first.

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)

Which graph of a hyperbola represents the equation 16x^2-y^2=16