so my calculator said -1×-1=1 within a week it changed now magicly my calculator says -1×-1=0 does anyone know the truth

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here