Great Deal! Get Instant $10 FREE in Account on First Order + 10% Cashback on Every Order Order Now

The amount spent worldwide in advertising on mobile devices can be estimated by f(x) = 0.4x2 + 0.01x + 0.9, where x is the number of years after 2005 and f(x) is in billions of dollars. When will...

1 answer below »
The amount spent worldwide in advertising on mobile devices can be estimated by f(x) = 0.4x2 + 0.01x + 0.9, where x is the number of years after 2005 and f(x) is in billions of dollars. When will worldwide mobile ad spending reach $41 billion?
Answered Same Day Dec 20, 2021

Solution

David answered on Dec 20 2021
126 Votes
f(x) = 0.4x2 + 0.01x+ 0.9 where
x = number of yrs after 2005
f(x) = amount in billion dollars
Given:
f(x) = 41
Putting into equation:
41 = 0.4x2 + 0.01x+ 0.9
0.4x2 + 0.01x− 40.1 = 0
Solving the quadratic equation by comparing to ax2 + bx+ c = 0 :
a = 0.4, b = 0.01, c = -40.1
The roots are...
SOLUTION.PDF

Answer To This Question Is Available To Download

Related Questions & Answers

More Questions »

Submit New Assignment

Copy and Paste Your Assignment Here