The current in the circuit shown is 2.0 a. what is the value of r3? a) 10 ω b) 15 ω c) 20 ω d) 55 ω

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.)

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.

2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?