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kvv77 [185]
3 years ago
9

Out of 450 phones in a store, 270 are new models. What percent of the phones are new models?

Mathematics
1 answer:
andrezito [222]3 years ago
4 0

Answer:

180

Step-by-step explanation:

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You are tossing an apple. After t seconds, the height of the apple in feet is given by h = -16t2 + 38.4t + 0.96. What is the dom
Nesterboy [21]

Using function concepts, it is found that the domain is 0 ≤ t ≤ 2.4, given by option C.

----------------------

The height of the apple after t seconds is given by:

h(t) = -16t^2 + 38.4t + 0.96

  • The domain of a function is the <u>set that contains all possible input values.</u>
  • The possible input values for this situation are the values of t between 0 and the instant in which the apple hits the ground, which is t for which h(t) = 0.

----------------------

h(t) = -16t^2 + 38.4t + 0.96

Which is a quadratic equation with a = -16, b = 38.4, c = 0.96

To find the solutions:

\Delta = b^2 - 4ac = (38.4)^2 - 4(-16)(0.96) = 1536

t_1 = \frac{-b + \sqrt{\Delta}}{2a} = \frac{-38.4 + \sqrt{1536}}{2(-16)} = -0.0247

t_2 = \frac{-b + \sqrt{\Delta}}{2a} = \frac{-38.4 - \sqrt{1536}}{2(-16)} = 2.4

The apple is in the air for 0 ≤ t ≤ 2.4, which means that the domain is given by option C.

A similar problem is given at brainly.com/question/23932338

7 0
3 years ago
What is the measure of VKW?
MrRissso [65]

Answer:

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Step-by-step explanation:

5x + 3 + 7x + 9 = 180

12x + 12 = 180

12x = 168

x = 14

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2 years ago
Does anyone know how to do this?
SCORPION-xisa [38]

Answer:

i think he is correct

Step-by-step explanation:

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Answer:

Step-by-step explanation:

First, plot the point (2, -3) on the graph.  Then, use the slope to pick another point.  The slope is rise over run.  For your slope, the line will go 3 places up and then 4 places to the right.  Using a straight-edge, follow the points and you will get the graph of the line.

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Area = 91 in²

Step-by-step explanation:

Hope it helps you!

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