Answer:
she has 6 $5 bills and 4 $10 bills I think I'm not sure
[x = Share price]
<span>52400 = (x - 2500) + (x + 1700) </span>
<span>We put each share as it will be at the end of the day. </span>
<span>52400 = 2x - 800 </span>
<span>We expanded/simplified the brackets int eh equation above. </span>
<span>53200 = 2x </span>
<span>Over here, we made the -800 on this side of the equation equal 0 so we added 800 to both sides. </span>
<span>26600 = x </span>
6 bc if you divide 56 by 9 you’ll get 6.2 but i’m not sure the ( .2 ) will matter therefore just get the first digit which is 6
Side of base of square, a = 10 km.
Height of pyramid , h = 12 km.
Volume of pyramid is given by :

Surface area is given by :

Therefore, volume and surface area are 400 km³ and 340 km² respectively.
Hence, this is the required solution.