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solmaris [256]
3 years ago
9

What class interval is appropriate for the measurement values reported as 4.1 cm?

Mathematics
1 answer:
jekas [21]3 years ago
4 0
4.1 is a measure to the nearest tenth.

The value preceding it is 4.0 while the value following it is 4.2

The midvalue of 4.0 and 4.1 is 4.05 while the midvalue of 4.1 and 4.2 is 4.15

Therefore, the class interval of a <span>measurement values reported as 4.1 cm is 4.05 to 4.14 cm</span>
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What is the distance between (–4, –10) and (–4, –4)?
Gre4nikov [31]

Answer:

6 units

Step-by-step explanation:

(-4 , -10) ; (-4 , -4)

Distance = \sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}}

               = \sqrt{(-4-[-4])^{2}+(-4-[-10])^{2}}\\\\= \sqrt{(-4+4)^{2}+(-4+10)^{2}}\\\\=\sqrt{0+(6)^{2}}\\\\= \sqrt{36}\\\\= 6

4 0
3 years ago
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A circle's radius that has an initial radius of 0 cm is increasing at a constant rate of 5 cm per second.
djyliett [7]

Answer:

a) r(t)=5t

b) A=\pi\cdot r^2

c) A=\pi\cdot (5t)^2

d) A=25\pi  t^2

Step-by-step explanation:

We know that the circle is increasing its radio from an initial state of r=0 cm, at a rate of 5 cm/s.

This can be expressed as:

r(0)=0\\\\dr/dt=5\\\\r(t)=r(0)+dr/dt\cdot t=0+5t\\\\r(t)=5t

a) Radius of the circle, r (in cm), in terms of the number of seconds, t since the circle started growing:

r(t)=5t

b) Area of the circle, A (in square cm), in terms of the circle's radius, r (in cm):

A=\pi\cdot r^2

c) Circle's area, A (in square cm), in terms of the number of seconds, t, since the circle started growing:

A=\pi\cdot r^2\\\\A=\pi\cdot (5t)^2

d) Expanded form for the area A:

A=\pi\cdot (5t)^2=25\pi\cdot t^2

3 0
3 years ago
(urgent please help me with this. Will give brainliest)
eimsori [14]
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3 years ago
Hii please help i’ll give brainly if you give a correct answer <br> - please show your work.
eduard

Step-by-step explanation:

1. In the picture down below.

2. Because they are = 20

100 ÷ 5 = 20

10 ÷ 0.5 = 10 x 2 = 20

1 ÷ 0.05 = 1 x 20 = 20

3 0
3 years ago
The ratio of boys to girls in a class is 3:5. how many girls if there are 27 boys
Stella [2.4K]

Answer:

45 girls

Step-by-step explanation:

since the ratio is 3:5, 3 being the boys, we can divide 27 by 3. We get nine, which is the number we multiply 5 with. 9*5=45 girls

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3 years ago
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