Lori bought a turtle for $8.85, two goldfish for $1.25 each, and a snail for $2.95. after she was charged 7% sales tax, how much was her total purchase

15.301

Step-by-step explanation:

8.85+2.5+2.95= 14.3

14.3 * .07= 1.001

14.3+1.001 = 15.301

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.