A colony of 200 bacteria multiplies by 2 every hour. How many bacteria are there after 5 hours?
Answer and explanation
Correct answer: B.
- Step 1: After each hour the number is multiplied by 2, so .
- Step 2: .
Answer
.
Why not the others: : The growth was treated as linear. : One extra hour was included. : The starting value was only added.
Practise more Algebra, Linear Systems and Functions.
Free questions with an explanation for every one, and full timed Egyptian Scholastic Test (EST) mock tests.
More Algebra, Linear Systems and Functions questions
- If , what is the value of ?
- A line in the xy-plane passes through the points and . What is the slope-intercept equation of this line?
- Solve the system of equations for : \begin{cases} 2x + 3y = 12 \\ x - y = 1 \end{cases}
- If , what is the value of ?
- Which of the following functions has a graph that does NOT intersect the x-axis?
- If , what is the value of ?