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New exercises from Khan Academy 2020-10-20T17:21:12.000000
Mis à jour : il y a 1 heure 35 min

Geometric distributions

mar, 2020-10-20 17:21
Practice calculating the mean and standard deviation of geometric distributions.

Symbols practice: The gradient

mar, 2020-10-20 17:19
Decipher vector, scalar, or nonsense from an expression involving the gradient, divergence, and curl.

Extend geometric sequences: negatives & fractions

mar, 2020-10-20 09:41
Find the next term in a geometric sequence. The problems in this quiz involve relatively difficult calculations.

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.

Evaluate logarithms (advanced)

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

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

Homes: reading realistic fiction; Feels Like Home 3

dim, 2020-10-18 20:28
3rd grade reading comprehension practice using realistic fiction

Finite geometric series word problems

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

Linear equations with unknown coefficients

dim, 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

dim, 2020-10-11 16:31
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Biological macromolecules

dim, 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

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

Pollination and fertilisation in plants

dim, 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.