Marbles marbles come in two sizes: 1-inch diameter and 2-inch diameter. The 1-inch diameter marbles cost 30 cents less than the 2- inch marbles. Rochelle buys 25 1-inch marbles for her science project and spends exactly $10 find the cost of a 2-inch marble

Question

$0.10
$2.80
$.070
$2.50

Answer 1

Let's assume that the cost of a 2-inch marble is x cents.
Given that a 1-inch marble costs 30 cents less than a 2-inch marble, the cost of a 1-inch marble is x - 30 cents.
Rochelle buys 25 1-inch marbles for her science project and spends exactly $10, which is equivalent to 1000 cents.
So, the cost of 25 1-inch marbles is 25 * (x - 30) cents.
We can set up the equation:
25 * (x - 30) = 1000
Simplifying the equation:
x - 30 = 40
x = 40 + 30
x = 70
Therefore, the cost of a 2-inch marble is 70 cents.
The correct answer is $0.70.