Divide and simplify the result. \( \frac{\frac{11}{\frac{6}{11}}}{\frac{11}{\frac{6}{11}}}=\square \)

A car was valued at \( \$ 45,000 \) in the year 1993 . The value depreciated \( \$ 12,000 \) by the year 2003 . A) What was the annual rate of change between 1993 and 2003 ?

In a box of 80 glasses, 3 are broken. Work out the percentage of broken glasses in the sox.

Calculate \( 1 \frac{3}{4}+\frac{3}{6} \) by finding a common denominator. Give your answer as a mixed number in its simplest form. \[ 1 \frac{3}{4}+\frac{3}{6}=\square \]

A car was valued at \( \$ 34,000 \) in the year 1990 . The value depreciated to \( \$ 11,000 \) by the year 2006 . A) What was the annual rate of change between 1990 and 2006 ?

Valuate \( \sum_{k=1}^{8}(-1)^{k+1} 3 k \)