Someone ! a researcher wishes to design a fully blocked experiment with groups of subjects representing every possible combination of 1 explanatory variable (control versus treatment) and 3 other variables (male versus female, old versus young, healthy versus ill) for a total of 4 variables. how many blocks will there be in her experiment? a. 32 b. 16 c. 4 d. 8

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.