8. A line segment with endpoints \( ( 1,9 ) \) and \( ( 7,15 ) \) has a midpoint at point \( C \) . What is the midpoint of a line segment with endpoints \( C \) and \( ( 1,9 ) \) ?
A) \( ( 2,10 ) \)
B) \( ( 2.5,10.5 ) \)
C) \( ( 3.25,11.25 ) \)
D) \( ( 4,12 )\)
B
How long will it take \(\$ 1500\) to double itself at \(6 \%\) sim- ple interest?
A pharmacist makes eye drops with saline solution. A \(10 \%\) saline solution mixed with an \(80 \%\) saline solution makes \(7\) cups of a \(60 \%\) saline solution. How many cups of the \(80 \%\) solution should be used?
