Six physicists describe the amount of a radioactive substance, Q in grams, left after t years. 1. Show that the expressions describing the radioactive substance are all equivalent. a) Q = 300(0.5)2t b) Q = 300(2)-2t c) Q = 300(0.0625)t/2 d) Q = 300(0.25) t e) Q = 75(0.25) t-1 f) Q = 600(0.5)

Which of the following is the true for f(x) = 5cos

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?