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New exercises from Khan Academy 2020-12-02T22:44:38.000000
Aggiornato: 28 min 6 sec fa

### Mean and standard deviation of difference of sample proportions

Lun, 2020-10-19 21:32
Practice calculating the mean and standard deviation of sampling distributions for differences in sample proportions, and use the large count condition to determine when these sampling distributions are approximately normal.

### Graph quadratics in standard form

Lun, 2020-10-19 21:27
Graph quadratic functions given in the standard form ax²+bx+c. For example, graph y=5x²-20x+15.

Lun, 2020-10-19 20:45
Evaluate advanced logarithmic expressions by using the fact that a^x=b is equivalent to log_a(b)=x.

### Choosing the best kinematic equation

Lun, 2020-10-19 14:59
Practice choosing the best kinematic equation to solve one-dimensional motion word problems.

### Stoichiometry: Mental math practice

Lun, 2020-10-19 05:14
Practice solving stoichiometry problems without a calculator in this set of free questions designed for AP Chemistry students.

### Finding the critical value t* for a desired confidence level

Dom, 2020-10-18 20:43
Practice finding the critical value t* for some given confidence level.

### Homes: reading realistic fiction; Feels Like Home 3

Dom, 2020-10-18 20:28

### Finite geometric series word problems

Dom, 2020-10-18 14:50
Understanding and solving problems with the formula for a finite geometric series

### Linear equations with unknown coefficients

Dom, 2020-10-18 14:42
Solve a linear equation where the coefficients are represented by letters.

### Find a missing side length when given area

Lun, 2020-10-12 15:33
Practice finding a missing side length on a rectangle when given the other side length and the area.

### How has citizenship changed over time: level 1

Dom, 2020-10-11 16:31
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### Biological macromolecules

Dom, 2020-10-11 16:03
How much do you know about biological macromolecules?

### Effect of changes in policies and economic conditions on the foreign exchange market

Dom, 2020-10-11 16:02
Practice your understanding of how exchange rates change when economic conditions change.

### Pollination and fertilisation in plants

Dom, 2020-10-11 15:58
This exercise provides practice for high school level concepts of pollination and fertilisation.

### Multivariable chain rule

Ven, 2020-10-09 20:44
Given two functions, find the derivative of their composition.

### Sequences and domain

Mer, 2020-10-07 19:01
Give the first few terms of a sequence, practice identifying recursive definitions with different indexes that produce the sequence.

### Divide quadratics by linear expressions (with remainders)

Mer, 2020-10-07 18:50
Divide quadratic expressions by linear expressions, where the linear expression isn't a factor of the quadratic expression, so the division has a remainder.

### Calculating the mean: data displays

Mar, 2020-10-06 21:44
Practice computing the mean of data sets presented in a variety of formats, such as frequency tables and dot plots.

### Dividing fractions

Mar, 2020-10-06 21:42
Practice dividing fractions by fractions. No negative numbers are used in this exercise.

### Subtracting decimals: hundredths

Mar, 2020-10-06 21:41
Complete subtraction problems where both numbers are written to the hundredths place.