The number of calories burned, c, varies directly with the time spent exercising, t. when lila bikes for 3 hours, she burns 900 calories. which of the following equations shows this direct linear variation?

c = 900t
c = 300t
c = 3t
c = t

Which of the points a(6, 2), b(0, 0), c(3, 2), d(−12, 8), e(−12, −8) belong to the graph of direct variation y= 2/3 x?

In an improper fraction, is the numerator equal to, less than, or greater than the denominator

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %