Rob says he can use 2 x 5 to find 4 x 5. is he correct

Yes, Rob can use 2 × 5 for multiplication of 4 × 5.

Step-by-step explanation:

We are given the following information in the question:

Rob can use 2 × 5 for multiplication of 4 × 5.

It can be used in the following manner:

Hence, Rob can do the multiplication in this way.

i'm pretty sure it's 477,585,296, but perhaps my math is incorrect.

no association

step-by-step explanation:

if you have eyes and you can use them efficiently you can see that it just looks like random dots like do a line of best fit and like they're so spread out it's such a weak association you might as well consider it nonexistent