A dog sleep from 10:36 PM to 3:36 AM. How long did the dog sleep?

5 hours.

Step-by-step explanation:

Note that the clock "restarts" at 12, and flips from PM to AM (and vice versa).

In this case:

1st hour: 10:36 - 11:36pm

2nd hour: 11:36pm - 12:36am

3rd hour: 12:36am - 1:36am

4th hour: 1:36am - 2:36am

5th hour: 2:36am - 3:36am

~

Step-by-step explanation:

10:36- 11:00=24 min

11:00-3:00= 4 h

3:00-3:36=36 min

add them up

=

5h

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.