Amotor-car has a hydraulic brake system. when the brake is applied, a circular piston of radius 6.0mm (in the master cylinder) exerts a force of 100.0n on the brake fluid. what force is applied to a wheel's brake shoe if the surface over which it is applied (at the wheel cylinder) is a circle of radius 30.0mm?

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.)