Todd's cube has an edge that measures
5 inches. kara's cube has an edge of
3 inches. if kara's cube was stacked
on top of todd's cube, what would
be the total volume of the combined
solid?

The volume of the combined solid is

Step-by-step explanation:

we know that

The total volume of the combined solid is equal to the volume of Todd's cube plus the volume of Kara's cube

The volume of the cube is equal to

where

b is the length side of the cube

step 1

Find the volume of Todd's cube

we have

substitute the value

step 2

Find the volume of Kara's cube

we have

substitute the value

step 3

Find the volume of the combined solid

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.