Answer:
9 gram/cm³
Step-by-step explanation:
Volume of a square (L³) = 2³ = 8cm³
Volume of a square (L³) = 2³ = 8cm³
But Density = mass/volume
But Density = Mass/Volume
Density = 72grams/8cm³
Density = 9grams/cm³
Answer:
3
Step-by-step explanation:
2 plus 1 is 3
Answer:
45 ways
Step-by-step explanation:
Total number of kids = 10
We have to select the 2 kids
So the number ways to select two kids 
We know that 
So 
So there are 45 ways to select 2 competitors
It’s the one that’s like: 0,0 1,1 2,2 3,3 because if y is a function of x both numbers will be the same