Alicia bought 4 t-shirts for $23.00. using the unit rate, how much would 6 t-shirts cost?

Try finding what the amount for 1 t-shirt would be: 23 divided by 4. We get 5.75. What we can do next is multiply 5.75 by 2 since we're trying to find out the cost of 6 t-shirts, this gives us 11.5. So now we add 23 to 11.5. We get 34.5. This means that 6 t-shirts would cost $34.50

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.