Patricia has decided that she would like to start a new business to provide swim lessons and has received bids to install an inground pool in her backyard. There are a lot of children in the neighborhood so she is hoping she can make enough money in the summer to provide income year round. She plans to charge $20 per hour for swim lessons. This new venture will likely not be successful because:

This new venture will likely not be successful because it is overpriced for it being in her backyard. If it is at her own house and not an official building, it is less likely to be visited.

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.