What is the multiple zero and multiplicity of f(x) = x3 + 2x2 + x

Atrucker had a load of grain containing 2 tons. she unloaded 1 ton and 1,200 pounds at the warehouse. how much grain does she still have left on the truck?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

The product of sin 30 degrees and sin 60 degrees is same as the product of