Making conclusions in a t test for a mean

A local pizza store knows the mean amount of time it takes them to deliver an order is $45$‍ minutes after the order is placed. The manager came up with a new system for processing delivery orders, and they were curious if it changed the mean delivery time. They took a sample of $40$‍ delivery orders to test $H_0:\mu =45$‍ minutes versus $H_{\text{a}}:\mu \ne 45$‍ minutes, where $\mu$‍ is the mean delivery time under the new system.

The delivery times in the sample had a mean of $48$‍ minutes and a standard deviation of $8$‍ minutes. These results produced a test statistic of $t\approx 2.37$‍ and a P-value of approximately $0.023$‍. Assume that the conditions for inference were met.