Which of the following statements about hearing protection are true ?

a. all statements are true

b. earplugs and earmuffs are the most common types of hearing protection devices

c. long exposure to high levels of noise can damage your hearing

d. osha requires your employer to provide you with hearing protection when you are exposed to loud noises for an extended period of time

The great length of north america causes the climate to be varied. true false

Least square fit to polynomial write a function leastsquarefit3pol that solves a linear system of equations to find a least squares fit of a third order polynomial to an experimental data set given as two row arrays. the function leastsquarefit3pol must explicitly solve a set of linear equations and cannot use polyfit. there should be no restriction on the size of the problem that can be solved.

If joey was single and his taxable income was $9,500, how much would he pay in taxes each year?