Which expression is equivalent to p·q·q·q·q·q·q·q·q·q?
1. pq^9
2. 9pq
3. (pq)^9
4. (pq)^10

An exponent is multiplying the same thing by itself a number of times.

For example,

There is one .

There are nine s.

This leaves us with , or .

We don't need a power of one, so we can just keep , or

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.

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.