Jamie just bought two boxes. the first box is square with each side measuring 10 units and is 4 units high. the second box is rectangular and has twice the volume of the square box. if the height of the second box is 5 units and width is 10 units what is the length of the second box

Step 1
find the volume of the square box
volume=area of the base*height
area of the base=10²> 100 units²
height=4 units
volume square box=100*4> 400 units³

step 2
volume rectangular box=2*volume square box
volume rectangular box=2*400> 800 units³

volume rectangular box=L*W*H
H=5 units
W=10 units
Volume=800 units³
800=L*10*5> solve for L
L=800/(10*5)> L=16 units

the answer is
the length of the rectangular box is 16 units