Please anyone who likes math please help me ASAP Factor the following:
x4 - 16

x4-2x2y2+y4

2x2-18x-20

5x2-50x+125

4x4+8x3+4x2

4x2+4x+1

x2+169

9x2-18x+9
and please no links

Which is the standard form for this number? (4 x 1 100 ) + (8 x 1 1,000 ) + ( 3 x 1 100,000 ) ? a) 0.004803 b) 0.04803 c) 0.0483 d) 0.483

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.

Item 1 solve for s. s+24=90 −114 −66 66 114