Suppose there is a simple index of two stocks - stock a and stock b. stock a
opens on monday with 5000 shares at $4.50 per share. stock b opens on
monday with 2500 shares at $7.25 per share. stock a opens on tuesday at
$5.10 per share, and stock b opens on tuesday at $7.45 per share. both
stocks have the same number of shares that they opened with on monday.
what is the rate of change of this simple index over 1 day?
a. -8.6%
b. 7.5%
c. -7.5%
d. 8.6%

Select the correct answer. given: ∆abc with prove: statement reason 1. given 2. ∠cab ≅ ∠edb ∠acb ≅ ∠deb if two parallel lines are cut by a transversal, the corresponding angles are congruent. 3. ∆abc ~ ∆dbe aa criterion for similarity 4. corresponding sides of similar triangles are proportional. 5. ab = ad + db cb = ce + eb segment addition 6. substitution property of equality 7. division 8. subtraction property of equality what is the missing statement in the proof? scroll down to see the entire proof.