Which expressions are equivalent to 2^5.2^4? Check all that apply. 2^20
2.2^9
2^10 • 2²
2^-2 2^11
(2.2.2.2.2).(2.2.2.2)

Step-by-step explanation:

The law of exponents says that when the base is same in multiplication, add the exponents.

The answer is 2 to the power of 9.

55/i dont know i do it for the points

step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m