All Tasks
Find x in the exponential equation
Find the value for $x$ using the properties of powers:
$2^{x+3}=2^{6}⋅3^{x-3}$
# Powers of integer exponent
Training
13
National Holiday
Within the framework of the celebration of the German unity day, the 3rd of October, the students of Pieter's class are going to organize a set of activities to be done at their school, with the objective of sensibilizing families about the importance of this holiday.
Pieter's class has 23 students, which 14 are girls.
The teacher is going to randomly choose a student to receive the families. What is the probability of the student chosen being a boy?
# One-stage random experiments
Reasoning
8
Interquartile range
Consider this sample:
$${45,47,49,50,52,55,57,60,63,65}$$
Now, find the interquartile range.
# Mean & median
Training
6
Negative Powers
This it's a multiple choise question.
Consider the power: $5^{-2}\;+\;7^{-3}$ . This Power can be represented in other way.
Choose the correct aswer.
# Powers
Training
8
Bad Students
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