Who was Radius helping when he discovered that the "magic number was more than 3"?

Radius was helping his father Sir Cumference.

Explanation:

The question above is related to the mathematical adventure story entitled "Sir Cumference and the Dragon of Pi."

Radius was the son of Sir Cumference and Lady Di of Ameter. One day, Sir Cumference drank a potion which turned him into a dragon. In order to restore his father's shape, radius needed to find the magic number called "pi."  

In mathematics, the value of pie is more than 3 (3.14 to be exact) and it is represented by the Greek symbol "."

So, this explains the answer.

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

it’s the first one your welcome