Question

During the past 10 years, the amount of money, M (in billions of dollars), spent in North America by car dealerships advertising their product can be modeled by the equation M = 0.18e0.4t + 0.51. In what year was about $5 billion (M = 5) spent by car dealerships in advertising?

Answer 1

Answer: I believe the 23rd, but if its in 10 years I must be wrong

I graphed the equation, but replaced t with x