Use benchmarks to choose the metric unit you would use to measure each.

1. width of a teacher's desk.
10 meters or 1 meter

2. the amount of liquid a punch bowl holds.
2 liters or 20 liters

3. distance between seattle and san francisco.
6 miles or 680 miles

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

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 (%)

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).