What is the sum of 2.5 × 104 and 3.4 × 104? a. 0.59 × 104 b. 0.59 × 108 c. 5.9 × 104 d. 5.9 × 108

2.5 × 104 + 3.4 × 104=(2.5+3.4)×104=5.9×104

C. 5.9×104

answer: all the values are within because it has a pattern that repeats from -6 to 4.

good luck!

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