Can someone please help me with thins it’s dude soon ty❤️

1) 5.02 × 105     2) 3.1 × 108   3) 7.97 × 109  4) 5.1 × 107  5) 7.4 × 103  6) 8.4 × 105 7) 0.92 × 106  8) 5.3 × 109

Step-by-step explanation:

90 m/s; it represents the average speed of the object between 2 seconds and 4 seconds

Step-by-step explanation:

f(b) - f(a) / b-2

First you would subtract 240-60 and 4-2 to get and then divide it to get 90m/s