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No. The only other change is that the data sufficiency is moved to DI section

Hello Folks! Can anyone help me with the question below? I am not sure what approach to take here 🤔

Expression reaches its maximum when T= 5. 2+ 5= 7 (B)

So in 2 of my mocks, I got 84 in Quant making 5 mistakes, while I got 83 in the other making 3 mistakes out of the 21 Qs. Can someone explain how it actually works?

This question is discussed in detail here: according-to-a-certain-estimate-the-depth-n-t-in-centimeters-of-126480.html Hope it helps.

I get it, but is there a way to find a way to find when the equation reaches its maximum ?

According to a certain estimate, the depth N(t), in centimeters, of the water in a certain tank at t hours past 2:00 in the morning is given by N(t)= -20(t-5)^²+500 for 0≤t≤10. According to this estimate, at what time in the morning does the depth of the water in the tank reach its maximum? A. 5:30 B. 7:00 C. 7:30 D. 8:00 E. 9:00 Consider this: -20(t-5)^2\leq{0} hence 500-20(t-5)^2 reaches its maximum when -20(t-5)^2=0 , thus when t=5 . 2:00AM+5 hours=7:00AM. Answer: B. Hope it helps.

Differention is another approach for finding maxima minima

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