astultz309459
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The equation ​ yˆ=−5.9x2+39x+2.2 ​ approximates the average number of cars that pass through an intersection x hours after 3:00 p.m. What is the best estimate for the average number of cars that pass through the intersection at 4:30 p.m.?

Respuesta :

tramserran

Answer: 74

Step-by-step explanation:

x = 4:30 - 3:00

  = 1:30

  = 1.5 hours

y = -5.9x² + 39x + 2.2

  = -5.9(1.5)² + 39(1.5) + 2.2

  = -5.9(2.25) + 58.5  + 2.2

  = 13.275 + 60.7

  = 73.975

Answer: 47

Step-by-step explanation:

x = 4:30 - 3:00

  = 1:30

  = 1.5 hours

y = -5.9x² + 39x + 2.2

  = -5.9(1.5)² + 39(1.5) + 2.2

  = -5.9(2.25) + 58.5  + 2.2

  = -13.275 + 60.7

  = 47.425

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