Juan and Alejandro go out to dinner. Their bill comes to $22.54 plus 8% tax. A. How much is added to their bill?
B. After the tax is added, the two want to leave an 18% tip. How much money should they leave after tax and tip?
C. Alejandro ordered an appetizer and decides he should pay $4 more than Juan after tax and tip. How much should each pay?

What is the equation of a parabola y(x) that has a vertex at point (− 1/3 , 0.3) and passes through point (− 2/15 , − 1/2 ).

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).