The vertical of a function secant are determined by the points that are not in the domain.

The vertical asymptote of a function secant are determined by the points that are not in the domain.

Step-by-step explanation:

The domain of a function is the set of x values for which the function is defined.

Secant function is not defined at

It means we cannot include these points in the domain.

At these points, we must have a vertical line which do not touch the graph. These lines are called "Vertical asymptotes"

Vertical asymptotes are not included in the domain of the function.

Hence, the correct word should be "Asymptote"

The vertical asymptote of a function secant are determined by the points that are not in the domain.

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.