1. The set of numbers {‐3, ‐2, ‐1, 0, 1, ‐‐‐} A. x > ‐4
B. x < ‐4
C. x >_ ‐4
D. x <_ ‐4

Explanation:

The set of numbers given to you is the set of values larger than -4, or stuff to the right of -4 on the number line. So we say x > -4

We could also say and mean the same thing. In either case, x is an integer.

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.