9 ÷ 20 is closest to...
A. 1/2
B. 1
C. 1 1/2

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Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?