Marbles come into Silas when is Skylander and two inch diameter the one is diameter marble cost 30 cents less than the 2-in marbles Rochelle buys 25 1-in marbles for her science project she spends exactly $10 to find the cost of a 2 in marble
2.50
2.80
0.70
0.10
Let's assume the cost of a 2-inch diameter marble is x dollars.
According to the given information, the cost of a 1-inch diameter marble is x - 0.30 dollars.
Rochelle buys 25 1-inch marbles, so she spends 25 * (x - 0.30) = 10 dollars.
This can be simplified as 25x - 7.50 = 10.
Adding 7.50 to both sides, we get 25x = 17.50.
Dividing both sides by 25, we get x = 0.70.
Therefore, the cost of a 2-inch diameter marble is 0.70 dollars.
Hence, the correct answer is 0.70.