Kevin takes a survey of the ages of people in the library at 10 a.m. and at 6 p.m. on a Wednesday.

Mathematics

2 answers:

Aliun [14]3 years ago

6 0

Answer:

Option 3rd is correct

Step-by-step explanation:

Kevin takes a survey of the ages of people in the library at 10a.m and at 6p.m on a Wednesday.

He should talk at library to new drivers on the dangers of texting and driving at the time when there are more people with the car.

So, that he can convey messages to more people in less time.

Therefore, Option 3rd is correct that is At 10 a.m., because there are more people with cars at the library at that time

SpyIntel [72]3 years ago

3 0

Answer:

1 is correct.

Step-by-step explanation:

I had the same question and I tried the other answer and so it was wrong. And in the correction I had, it was the first one.

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Manny observed a Northern Gannet, a deep diving seabird, hovering at a height of 10 meters above the ocean surface. The bird the

mr Goodwill [35]

Answer:

9.2 seconds.

Step-by-step explanation:

We have been given an equation that represents dive of a bird as $y=x^2-10.3x+10$ , where x represents the time the dive lasted in seconds and y represents the height of the bird in meters.

We can see that our given equation is a parabola. The leading coefficient is positive, so our parabola will be an upward opening parabola.

Upon graphing our given equation, we will get our required graph as shown in the attachment.

As x represents the time the dive lasted in seconds and y represents the height of the bird in meters, so the bird will be at the surface when the graph will cross x-axis.

We can see that graph crosses x-axis at $x=1.085\text{ and }x=9.215$ .

Upon rounding to nearest tenth, we will get:

$x\approx 1.1\text{ and }x=9.2$ .

At $x\approx 1.1$ the bird dives in water and goes down the water surface and at $x=9.2$ the bird comes to the surface, therefore, the bird will be at surface after 9.2 seconds.