3601-589= What strategy did you use?

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16