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horrorfan [7]
3 years ago
6

Please answer this multiple choice question for 23 points and brainliest!!

Mathematics
1 answer:
luda_lava [24]3 years ago
5 0

Answer:

  A.  T = 20°C - (2.8°C/h × 4h)

Step-by-step explanation:

The rate of change of temperature (-2.8°C/h) is multiplied by time (4h) to get the change in temperature (-11.2°C). That change is added to the initial temperature (20°C) to find the temperature after 4 hours.

Only equation A properly expresses this calculation.

In choice B, the rate of change is (wrongly) shown as +2.8°C/h. In the other choices, the combinations of units are nonsense. (What is a °C·h?)

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Step-by-step explanation:

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The next model of a sports car will cost 4.4% more that the current model. The current model costs $48,000, How much will the pr
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Answer:

$50,112.  Increase is $2,112

Step-by-step explanation:

1st way.  $48,000 x 1.044 = $50,112.  1.044 is the same thing as saying 104.4% of the total price in decimal form, which is what the new price would be when adding 4.4% to the 100% of the original price.  To get the amount of increase just find the difference in the two.  $50,112-$48,000 = $2,112

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Solve for x:<br> -3(x-2)^2+17=0 <br> round your answer to the nearest hundredth
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Answer:

-3(x-2)×2+17=0

  1. -3x+6×2+17=0
  2. -3x+12+17=0
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