A study of air quality in a particular city by an environmental group suggests that t years from now the level of carbon monoxide, in parts per million, in the air will be a=0.2t2+0.01t+5.1.

a. What is the level, in part per million, now? [Hint: if t is years from now, what is t right now?]

b. How many years from now will the level of carbon monoxide be at 8 parts per million? Round to the nearest tenth.

Given the conditional statement, match the following. conditional statement: if two lines intersect, then their intersection is one point.

Afurniture manufacturer produces chairs and sofas. each chair requires 10 yards of fabric, and each sofa requires 20 yards of fabric. the manufacturer has 300 yards of fabric available. to fulfill orders, the number of sofas must be at least twice the number of chairs. let x be the number of chairs and y the number of sofas. which inequalities are described in the problem? check all of the boxes that apply

Which expression gives the area of the triangle shown below