Determine the volume in ml of 0.33 m hi(aq) needed to reach the half-equivalence (stoichiometric) point in the titration of 30.5 ml of 0.48 m (ch3)2nh(aq). enter your answer with one decimal place. the kb of dimethylamine is 5.4 x 10-4.

The temperature in gavin's oven is a sinusoidal function of time. gavin sets his oven so that it has a maximum temperature of 280°f and a minimum temperature of 240°. once the temperature hits 280°, it takes 20 minutes before it is 280° again. gavin's cake needs to be in the oven for 30 minutes at temperatures at or above 270°. he puts the cake into the oven when it is at 260° and rising. how long will gavin need to leave the cake in the oven? (round your answer to the nearest minute.)