Lizzy: The parking lot in front of the school has 52 parking spaces. The parking lot in the back of the school has 38 spaces. If 39 cars have parked and 1/2 of the spaces of the back are filled, how many parking spaces are still available in the school?.
Me: Hmmm, let me think. I think this is the detailed solution:
There are a total of 52 + 38 = 90 parking spaces in the school. Since half of the spaces are filled then, 38 x 1 / 2 = 19 cars have parked at the back. So, a total of 39 + 19 = 58 cars have parked in the school. Therefore, 90 - 58 = 32 parking spaces are still available. Final answer: 32.