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Devesh

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3
Plot graph of 5x^0.8 - 3x + 20 = y (similar equation) on *DESMOS*(graph plot app/site) and zoom into1st quadrant(cuz we only have to check corresponding mass values for only positive values of time) and you will find Maxima at 4.2 second.
Second part is easy just put t=4.2 in question. Last part can be found by putting respective time values as asked in question into equation of dm/dt
/*At t=4.2 second mass will be MAXIMUM*/ Because at maxima slope needs to be zero and for this equation slope is zero (i.e horizontal to x axis when we plot graph of m(on y axis) vs t(on x axis)) at t=4.2seconds. You can do dm/dx and put it equal to zero
I need help doing the concert web summary on the types of preservation

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