Please help thank you in advance

Question

A biker is slowing down according to the following table of velocities:

Time (secs)	0	1	2	3	4
Velocity (feet/sec)	25	20	16	12	10

Approximate the distance traveled, in feet, during these 4 seconds using 4 rectangles and a Left Riemann Sum.

20.75 

58 

73 

83

Answer 1

Distance = velocity * time, left-hand sum gives d = L₄ = (25 + 20 + 16 + 12) * (1 sec width of each rectangle) = 73.