Which one of the following is not correct for a normal distribution? Explain your choice. A. The density curve is symmetric and the mean is at the center of the symmetry of the curve.
B. The standard deviation is the distance from the center to the change-of-curvature points on either sides.
C. The quartiles are located about 1 standard deviation away from the mean.

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.

i agree because i see the other persons thinking is clear

actually what is a question i don't understand