12. [-/10 Points] DETAILS SCALCET9 2.6.068. 0/10 Submissions Used MY A tank contains 9,000 L of pure water. Brine that contains 30 g of salt per liter of water is pumped into the tank at a rate of 25 L/min. (a) Find the concentration of salt after t minutes (in g/L). C(t) = 9/L (b) What happens to the concentration (in g/L) as t - co? 9/L Need Help? Read It Watch It[-/10 Points] DETAILS SCALCET9 2.6.016. 0/10 Submissions Used Find the limit. (If the limit is infinite, enter 'co' or '-co', as appropriate. If the limit does not otherwise exist, enter DNE.) lim -3 x - 00 2x + 5 Need Help? Read It 5. [-/10 Points] DETAILS SCALCET9 2.6.022. 0/10 Submissions Used Find the limit. (If the limit is infinite, enter 'co' or '-co', as appropriate. If the limit does not otherwise exist, enter DNE.) lim (42 + 1) (802 - 1) U - - co (42 + 4) 2 Need Help? Read It3. [-/10 Points] DETAILS SCALCET9 2.6.015. 0/10 Submissions Used MY NOTES ASK YOU Find the limit. (If the limit is infinite, enter 'co' or '-co', as appropriate. If the limit does not otherwise exist, enter DNE.) lim 4 x+ 5 x - 0 7x - 1 Need Help? Read It2. [-/10 Points] DETAILS SCALCET9 2.6.013.MI. 0/10 Submissions Used MY NOTES ASK Evaluate the limit using the appropriate properties of limits. (If the limit is infinite, enter 'co' or '-co', as appropriate. If the limit does not otherwise exist, enter DNE.) 8x2 - 3 lim x 90 9x2+ x - 3 Need Help? Read It Watch It Master It