Graph y=cos(x-π/2) over a one period interval

Which unit of measure would be the most appropriate to measure the capacity of a bottle of nail polish? a.fluid ounces b.cups c.pints d.quarts e.gallons

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be able to prepare using the sauce?

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?