Question

The growth of a new strain of bacteria is represented by y=79.31(1.48)^x where x represents the number of days and y represents the number of bacteria which is the best prediction for the number of bacteria on day 8?
A) 1826 bacteria
B) 2024 bacteria
C) 2702 bacteria
D) 939 bacteria

Answer 1

So we are given the equation
y = 79.31(1.48)ˣ
Whereas the x represents the number of days <--- what you need to know
y is the final number you are going to get, does not matter for now
You are trying to find the number of bacteria on Day 8
Put 8 into x
PEMDAS
Parentheses
Exponents
Multiplication/Division
Addition/Subtraction
1.48⁸ = 23.019
79.31 * 23.019 = 1825.667
Your answer would be A.