when hiking you come across a funky looking bone that feels like a rock. you suspect this bone is a fossil. you take the bone to a lab and have it tested for the isotope Uranium-235 because you know the half life to be 684 million years. the lab tells you the bone currently has 66% of its original uranium-235.

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

The tile along the edge of a triangular community pool needs to be replaced? ?