it´s due in a HOUR (answer these questions but also can you show me how you do it to :> thanks) -Evaluate 1/2b + 1/6 when b=1/3

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi