Answer
The sum in the tenth row is $512.$
Work Step by Step
To find a pattern, try dividing neighboring terms in the sequence:
$2/1=2$
$4/2=2$
$8/4=2$
$16/8=2$
$\vdots$
So, we can conclude that each next term in the sequence is obtained by multiplying the previous one by $2$
The ninth term is:
$128\times 2=256$
The tenth term is
$256\times 2=512$
The sum in the tenth row is $512.$
