Draw and solve 5. Two buildings are 30 ft apart. The angle of depression from the 
top of higher building to the top of the other building is 19°. What is the difference in the heights of the buildings.

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

If m 17 27 90 63 ** picture is attached

4. bob solved the inequality problem below incorrectly. explain his error and redo the problem showing the correct answer. ? 2x + 5 < 17 ? 2x + 5-5 < 17-5 -2x/-2 < 12/-2 x < -6