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snow_tiger [21]
3 years ago
6

Plz help me with this question I don't understand it!!

Mathematics
1 answer:
Sav [38]3 years ago
3 0
9t-7t-t^2
2t-t^2

Hope this helps :)
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You are going to the amusement park with some friends! There are 3 different rides you all want to get to before the park closes
spin [16.1K]

Answer:

The second one

Step-by-step explanation:

4 0
2 years ago
What's 8,936.25 to the nearest hundred? please help​
klemol [59]

Answer:

9,000.

Step-by-step explanation:

Since the hundreds column contains a 9, we need to move to the thousands column and add 1. When doing this you do not need to include the rest of the numbers. (Just replace them with zeros.)

Hope that helps. x

5 0
2 years ago
Alaska has a land area of about 1,700,00 square kilometers. Florida has a land area 1/10 the size of Alaska. What is the land ar
Evgen [1.6K]
The land area of Florida <span>65,755</span>
5 0
3 years ago
The volume of sphere is increaseing
Artemon [7]

Volume of a sphere:

<em>V</em> = 4/3 <em>π</em> <em>r</em> ³

Differentiate <em>V</em> with respect to time <em>t</em> :

d<em>V</em>/d<em>t</em> = 4<em>π</em> <em>r</em> ² d<em>r</em>/d<em>t</em>

Surface area of a sphere:

<em>A</em> = 4<em>π</em> <em>r</em> ²

Differentiate <em>A</em> with respect to <em>t</em> :

d<em>A</em>/d<em>t</em> = 8<em>π</em> <em>r</em> d<em>r</em>/d<em>t</em>

<em />

You're given that the volume is increasing at a constant rate, d<em>V</em>/d<em>t</em> = 10 cm³/s, so

10 cm³/s = 4<em>π</em> <em>r</em> ² d<em>r</em>/d<em>t</em>

Solve for d<em>r</em>/d<em>t</em> (the rate of change of the sphere's radius):

d<em>r</em>/d<em>t</em> = 5/(2<em>π</em> <em>r</em> ²) cm³/s

Substitute this into the equation for d<em>A</em>/d<em>t</em> :

d<em>A</em>/d<em>t</em> = 8<em>π</em> <em>r</em> (5/(2<em>π</em> <em>r</em> ²) cm³/s)

d<em>A</em>/d<em>t</em> = 20/<em>r</em> cm³/s

At the moment the radius is <em>r</em> = 5 cm, the surface area is increasing at a rate of

d<em>A</em>/d<em>t</em> = 20/(5 cm) cm³/s = 4 cm²/s

When the surface area is increasing at a rate of d<em>A</em>/d<em>t</em> = 2 cm²/s, the radius <em>r</em> is such that

2 cm²/s = 20/<em>r</em> cm³/s

which happens when the radius is

<em>r</em> = 20/2 (cm³/s) / (cm²/s) = 10 cm

4 0
3 years ago
Find the volume of the cylinder. Use 3.14 for π. Round your answer to the nearest tenth.
Maurinko [17]

Answer:

409.77 is the answer!

Step-by-step explanation:

3 x 3 x 3.14 x 14.5

pie x r^2 x h = V

3 0
2 years ago
Read 2 more answers
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