The length of one rectangle is 3 1/2 mm with a width of 2 4/5 mm . What is the area of the rectangle?

What is the result of the following division?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

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