The loudness, L, measured in (Db), of a sound intensity, I, measured in watts per square meter, is defined as L=10log1/1 0, where l o= 10^-12 and is the least intense sound a human ear can hear. What is the approximate loudness of a rock concert with a sound intensity of 10^-1

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

For a sewing project, maria divides 5 yards of fabric into 12 -yard strips. how many strips will maria have for her project?