Annie is sledding down a snow-covered hill. she knows that the steeper the hill, the faster her sled will go. a. the amount of snow is a function of the speed of the sled. b. the speed of the sled is a function of the amount of snow. c. the speed of the sled is a function of the steepness of the hill. d. the steepness of the hill is a function of the speed of the sled.

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.