Tl
4. tres barredoras recolectan la basura de 20 calles a la redonda del centro histórico al mismo
tiempo, en un lapso de 8 horas. si se descompone la barredora a, entonces by c realizan el
trabajo en 12 horas, pero si se averían a y b, la barredora c lo hace en 18 horas. responde:
a) ¿cuánto tardan, por separado, las barredoras a y b en realizar la limpieza?
b) si en una hora la barredora a limpia 72 m² de superficie, ¿cuál es la superficie total de las
calles que barren a, b y c?
c)¿cuántos metros cuadrados asea por hora cada barredora b y c?

why can't you?

step-by-step explanation:

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.

a natural event such as a flood, earthquake, or hurricane that causes great damage or loss of life.

step-by-step explanation: