Let T(I) denote the income tax, in dollars, that you pay on a yearly income of I dollars. The rate of change dT /dI is known as the marginal tax rate. Required:
Explain the meaning of the marginal tax rate in practical terms.

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Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212