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 = 0.15e0.3t + 0.78. In what year was about $3 billion (M = 3) spent by car dealerships in advertising?
A. t = 9
B. t = 10
C. t = 8
D. t = 3
IF your equation is transcribed correctly, just substitute M=3,000,000,000 into the equation and solve for 't' IS your equation written correctly? I question the '0.78' portion.....is that SUPPOSED to be part of the EXPOPNENT?? 0.15e^(.3t+.78) ???
IF your equation is transcribed correctly, just substitute M=3,000,000,000 into the equation and solve for 't' IS your equation written correctly? I question the '0.78' portion.....is that SUPPOSED to be part of the EXPOPNENT?? 0.15e^(.3t+.78) ???
OK M=3 (NOT 3000000000) results in t=8.982 I would go with 'A'
