# Lesson 7Logs Go ViralPractice Understanding

Fill in the table for each of the given functions.

### 5.

Using the functions from the first four problems, label each graph with the function that describes it.

### 6.

Identify the point(s) that all of the functions from problems 1–5 share. Explain why this is logical.

### 7.

Which of the graphs from problems 1–5 have a line of symmetry at ?

## Set

### 8.

A certain bacteria population is known to double every minutes. An experiment is being conducted in a microbiology lab. Suppose there are initially bacteria in a petri dish.

Make a table, graph, and an equation that will predict the number of bacteria in hours.

#### a.

Complete the table that will predict the number of bacteria in hours.

Time in Hours

Number of Bacteria

#### b.

Make a graph that will predict the number of bacteria in hours.

Label the scale on both the - and -axes. Make sure you can fit at least points on your graph.

#### c.

Write an equation that will predict the number of bacteria in hours.

### 9.

#### a.

Between what times, to the nearest of an hour, will the number of bacteria exceed ?

#### b.

Between what times, to the nearest of an hour, will the number of bacteria exceed ?

### 10.

Predict the number of bacteria after a -hour period. (Write your answer in scientific notation.)

### 11.

Write a logarithmic equation that would allow you to find the time when there are bacteria.

### 12.

Calculate the time when there are bacteria. (Round your answer to three‌ decimals.)

## Go

Use the properties of logarithms and the given values to find the value of the indicated logarithm.

Do not use a calculator to evaluate the logarithms.

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