A scientist uses a submarine to study ocean life. She begins at sea level, which is an elevation of o feet.
She descends 23.6 feet.
• She then ascends 13.4 feet.
Next, she travels down a second time, 21.1 feet.
How many feet must she now rise to get back to sea level?

31.3 feet

Step-by-step explanation:

-23.6+13.4 = -10.2

-10.2 - 21.1 = -31.3

31.3 feet

Step-by-step explanation:

0 -23.6 + 13.4 - 21.1 = -31.3

So to get back to sea level she must ascend 31.3 feet.

$15 each

step-by-step explanation:

$45/3 children= $15 each

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.