Question

I got a problem wrong and I don't know why. Here it is: A highway construction warning sign blinks on and off. In all, the sign is on for 0.88 of each minute. For how many seconds is the sign on in 5 minutes? I multiplied 0.88 x 5 and got 4.40 but it was marked wrong. What did I do wrong?
Ms. Sue
0.88 * 60 = 52.8 seconds

52.8 * 5 = 264 seconds

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