3. a running track has the shape of a rectangle capped with a semicircle on each end, as shown below. if
the track is 80 feet wide, and the rectangular portion of the track is 90 feet tall, estimate the length
around the outside of the track.

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project