The correct answer is A $4.28 x 4 = $19.28
This question was once asked before so I will put it here.
The correct answer for the question that is being presented above is this one: "x = 2; a = 5; b = 3" A 5 inch tall bamboo shoot doubles in height every 3 days. If the equation y=ab^x, where x is the number of doubling periods, represents the height of the bamboo shoot.
Divide! If you add three and four, you get seven. Subtracting four from seven, you get three. If you multiply three and four, you get twelve. If you then divide by four, you get back to 3. I hope this helped!
Well based on this information, I don't think that this is a valid inference. There isn't enough data to go off of in order to answer this question.
