A 80-foot-long escalator rises from the first floor to the second floor of a shopping mall. The
escalator makes a 30° angle with the horizontal first floor. How high above the first floor is the
second floor? (Draw a picture)
a . 4012
b .2570
C . 40ft
D. 160ft

What two criteria are needed for triangles to be similar

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function. a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.

Hundred and tens tables to make 430 in five different ways