B. 2 only. C. 2 and 3 only. D. 1, 2 and 3. Price increases from $3 to $4 and quantity demanded decreases from 110 to 90 units. What is the arc price

B. 2 only. C. 2 and 3 only. D. 1, 2 and 3. Price increases from $3 to $4 and quantity demanded decreases from 110 to 90 units. What is the arc price elasticity? A. -0.7 b. -0.55 c. -0.88 d. Unitary Total revenue is a maximum when a. price elasticity is -1. B. demand is inelastic. C. demand is elastic d. marginal revenue is zero. E. More than one of the above. The demand equation is given by Q = 50 - 2P. What is the point elasticity at P = $10?