trying to ascend
Oldcel KHHV
★★★★★
- Joined
- Aug 30, 2020
- Posts
- 15,946
A dodecahedron has twelve faces, that are regular pentagons. Choosing 2 dinstinct vertices, what's the probability that they belong to the same edge?
I asked my question firstI got a problem for you: What's the reason you don't kill yourself
answerI asked my question first
The relative importance of visual-spatial and verbal working memory for mathematics performance and learning seems to vary with age, the novelty of the material, and the specific math domain that is investigated. In this study, the relations between verbal and visual-spatial working memory and performance in four math domains (i.e., addition, subtraction, multiplication, and division) at different ages during primary school are investigated. Children (N = 4337) from grades 2 through 6 participated. Visual-spatial and verbal working memory were assessed using online computerized tasks. Math performance was assessed at the start, middle, and end of the school year using a speeded arithmetic test. Multilevel Multigroup Latent Growth Modeling was used to model individual differences in level and growth in math performance, and examine the predictive value of working memory per grade, while controlling for effects of classroom membership. The results showed that as grade level progressed, the predictive value of visual-spatial working memory for individual differences in level of mathematics performance waned, while the predictive value of verbal working memory increased.
Not your sister.
Proof?Not your sister.
Professional pic.Proof?
So?Professional pic.
Brazil
The sum of the edges of each pentagon is 60 (5 edges * 12 pentagons). At the vertex, 3 edges meet, so there is 20 vertices (60/3). 20 choose 2 is 190. The number of edges of the dodecahedron is 30, because each pentagon shares an edge (60/2). So there are 30 edges out of 190 possible outcomes So the probability is 3/19A dodecahedron has twelve faces, that are regular pentagons.
WrongThe sum of the edges of each pentagon is 60 (5 edges * 12 pentagons). At the vertex, 3 edges meet, so there is 20 vertices (60/3). 20 choose 2 is 190. The number of edges of the dodecahedron is 30, because each pentagon shares an edge (60/2). Which is 30 less than the sum of the edges of each pentagon. There is also 60 connections that aren't edges (5 connections * 12 pentagons). So 100/190 (190-30-60) connections remain. So the probability is 10/19
Ok now post your sister