What scientific tool is needed to determine if any of the specimens in Table 1 are made of one or more cells?

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup