Brian likes to grow cactus plants in his kitchen window. He has read that around 90 percent of a cactus's volume is used for water storage. He wondered which of two types of cacti in the window could hold the most water, so he decided to estimate their volumes to make a comparison. Brian's measurements are shown in the diagram below. For the column cactus the density = 4.5cm and the height =16cm for the barrel cactus the density = 8cm and the height = 8cm. Assume that the shapes fill the given dimensions. Don't take into account gaps or spines on the surface when determining the volume. Calculate the approximate volume of each cactus using 3.14 for π. ​

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step-by-step explanation:

the orientation of the parabolas can easily be found by analysing the power of x and y and their signs. if x is squared , parabola opens up and also if its coefficient is negative it opens down. if y is squared , the parabola opens right and also if its coefficient is negative it opens left. however in order to do the above analysis our equation must be in standard form .

our parabola is

which is not standard form of any parabola . hence we square on both hand side and convert it into standard form.

hence we see that x is squared and its coefficient is non negative . there for it opens up.

answer: just subtact the units and then add the non negative : happy to

step-by-step explanation: