Kevin and Amy are working on an experiment in the science lab. they start with 2.3 grams of oil and add water to get exactly 4.21 grams of solution. to find the amount of water added, they subtract the weight of the oil from the weight of the solution. Kevin calculates the difference to be 3.98 grams; Amy calculates it to be 1.91 grams. who is correct?

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

What additional information could be used to prove abc =mqr using sas? check all that apply.

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.