Exercise I: PQRS is a rectangle in which PS= 10cm and PS = 6 cm. T is a point on PQ such that. RST is an isosceles triangle whose eyual
sides are RS and ST. Find RT.
Exercise II: PQRS is a rectangle in which PO = 9 cm
and PS = 6 cm. T is a point on PQ such that
PT = 7 cm and RV is the perpendicular
from R to ST. Calculate ST and RV.

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