Josie spots her brother Dan from the roof of a block of flats. The angle depression from Josie to Dan is 45 degrees. The distance from Josie directly to Dan is 80 metres. Calculate the height of the block of flats. Give your answer correct to 2 decimal places.

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

The surface area of the triangular prism is .

The water aquarium shark tank is always greater than 25 feet of the water level decreased by 6 feet during cleaning what was the water level before the cleaners took out any water