The graph below shows the number of napkins arranged on different numbers of tables in a room: a graph is shown. the values on the x axis are 0, 1, 2, 3, 4, 5. the values on the y axis are 0, 14, 28, 42, 56, and 70. points are shown on ordered pairs 0, 0 and 1, 14 and 2, 28 and 3, 42 and 4, 56. these points are connected by a line. the label on the x axis is number of tables. the title on the y axis is number of napkins. what does the point (1, 14) on the graph represent? the ratio of napkins to tables is 15: 1. there are 14 napkins for every 1 table. the ratio of tables to napkins is 15: 1. there are 14 tables for every 1 napkin.

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.