Suppose that the halflife of a substance is 250 years . If there were ir 100 the substance , (a) give an exponential model for the situation, and (b) how much wil years? can anyone answer this please:(

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

Factor x2 – 8x + 15. which pair of numbers has a product of ac and a sum of what is the factored form of the