Tasha assembled a picture frame that is advertised as rectangular. the completed frame is 14 inches long and 10 inches wide. she measured the diagonal length across the frame as 20 inches. which best explains why the frame cannot actually be rectangular?

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

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