Question: Business spending on technology in a study conducted in 2003, business spending on technology (in billions of dollars) from the beginning of 2000 through 2005 was projected to be
S(t) = -1.88t3 + 30.33t2 - 76.14t + 474 (0 ≤ t ≤ 5)
Where t is measured in years, with t = 0 corresponding to 2000. Show that the graph of s is concave upward on the interval (0, 5). What does this result tell you about the rate of business spending on technology over the period in question?