Laura tiene en su cuenta ahorro del banco $23.500. Si paga el recibo de la luz que son $12.000 además también paga el recibo del teléfono que son $13.500. ¿Cuánto dinero queda en su cuenta?

le queda -2

Step-by-step explanation:

porque 23.500 - 12.000 = 11.5 - 13.500 = -2

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.

addition

step-by-step explanation: