In a volcano erupting lava flows continuously through a tube system about 11 kilometers to the sea. Assume a lava flow speed of 0.5 kilometer per hour and
calculate how long it takes to reach the sea.

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

i have not got your picture clearly so see it once again

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.

since no one answered yet i will give it a shot, not completely sure tho.

i think it should be y=cos(x+2pi), (third answer, answer c)

good luck.