Investigators did a test to find out the absolute frequency of how many students missed school in a week. There are 230 students. Number of days: $${Day 1...Day 7}$$ Absolute frequency: $${0,6,7,4,1,3,2}$$ What is the relative frequency? Please round to three decimal digits here.

# Absolute & relative frequency

Training
5

#### Natural Logarithm

Fill in the blank spots.

# Exponential properties

Learning
11

#### Exponential Function

The function $y=3^x$ is given. For what $x$ has the function the values $0.4$ and $1.4$? Round to three decimal places.

# Exponential function

Training
11

#### Median of heights

Some students in a class measured their heights as displayed: $${155,157,162,164,166,177,177}$$ What is the median?

# Probability

Learning
5

#### What do you prefer between sea and mountain?

We made a soundage about what people prefer between sea and mountain for holidays (look to the image to see the percentages): blue part prefer the sea; yellow part prefer the mountain; red part don't mind between them. Knowing that the people who prefers sea are 146, how much are the total of people?

# Boxplot & histogram

Training
9

#### Least common multiple, Greatest common divisor

To solve the main task (and a lot of similar problems), knowing the least common multiple and the greatest common divisor can be useful. So, fill in the blanks and complete the definitions.

# Fractions

Learning
6