what is the lag time at a distance of 640 km? (hint: look at the s - p line.)\ntime (seconds)\n30 300 400…

what is the lag time at a distance of 640 km? (hint: look at the s - p line.)\ntime (seconds)\n30 300 400 500 600 700 distance (kilometers)\n70\n60\n50\n40\ns - p\n30\n70 seconds\n65 seconds\n60 seconds\n78 seconds

what is the lag time at a distance of 640 km? (hint: look at the s - p line.)\ntime (seconds)\n30 300 400 500 600 700 distance (kilometers)\n70\n60\n50\n40\ns - p\n30\n70 seconds\n65 seconds\n60 seconds\n78 seconds

Answer

Answer:

B. 65 seconds

Explanation:

Step1: Locate 640 km on x - axis

Find 640 km on distance axis.

Step2: Read corresponding y - value

Read the time value on S - P line at 640 km. It is approximately 65 seconds.