The amount of time a certain brand of light bulb lasts is normally distribued with a mean of 2000 hours and a standard deviation of 50 hours. Using the empirical rule, what percentage of light bulbs last between 1950 hours and 2050 hours?.

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Asquare is dilated by a scale factor of 1.25 to create a new square. how does the area of the new square compare with the area of the original square? a)the area of the new square is 1.25 times the area of the original square. b)the area of the new square is 2.50 times the area of the original square. c)the area of the new square is 1.252 times the area of the original square. d)the area of the new square is 1.253 times the area of the original square.

What is the reflection image of (5,-3) across the line y = -x?