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2 years ago

10

a spinner is divided into five equal sections labeled 1 to 5 what is the probability that the spinner will land on 3

2 answers:

Vesna [10]2 years ago

7 0

Since there are 5 possible outcomes and 3 is only one of the outcomes, the probability would be 1/5 or 20%

Lorico [155]2 years ago

7 0

Hey there! Hello!

For this problem, there's an equal chance you will land on 1 of the 5 spots, no matter which spot it is. This also applies to spot 3, since it is 1 of the available 5 spots to land on. This means that there is a 1 in 5 chance that it will land on spot 3. This can also be expressed as a 20% chance.

Hope this helped you out!

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3 years ago

Read 2 more answers

are any two regular polygons similar. The area of the smaller figure is about 390 cm^2. choose the best estimate of the area of

galben [10]

Answer:

The best estimate of the area of the larger figure is $693\ cm^{2}$

Step-by-step explanation:

step 1

<em>Find the scale factor</em>

we know that

If two figures are similar, then the ratio of its corresponding sides is equal to the scale factor

Let

z----> the scale factor

x-----> the corresponding side of the larger figure

y-----> the corresponding side of the smaller figure

so

$z=\frac{x}{y}$

we have

$x=12\ cm$

$y=9\ cm$

substitute

$z=\frac{12}{9}=\frac{4}{3}$ -----> the scale factor

step 2

<em>Find the area of the larger figure</em>

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z----> the scale factor

x-----> the area of the larger figure

y-----> the area of the smaller figure

so

$z^{2}=\frac{x}{y}$

we have

$z=\frac{4}{3}$

$y=390\ cm^{2}$

substitute and solve for x

$(\frac{4}{3})^{2}=\frac{x}{390}$

$(\frac{16}{9})=\frac{x}{390}$

$x=390*16/9=693.33\ cm^{2}$

4 0

2 years ago

Find the perimeter of this semi-circle with diameter, d = 18cm. Give your answer as an expression in terms of pi.

OLga [1]

Answer:

The perimeter of the given semi-circle in terms of $\pi$ is

$P=9\pi$ cm

Step-by-step explanation:

Given that the diameter of the semi-circle is 18cm

That is d=18cm

Therefore radius $r=\frac{d}{2}$

$r=\frac{18}{2}$

Therefore radius r=9cm

To find the perimeter of the semi-circle :

perimeter of the semi-circle $P=\pi r$

$P=\pi\times 9$ cm (where r=9 cm )

$P=9\pi$ cm

The perimeter of the given semi-circle in terms of $\pi$ is

$P=9\pi$ cm

8 0

2 years ago

................................find 8% of 2.36.

slega [8]

2,36 ------- 100%
x --------- 8%
----------------------

x = 2,36*8/100 = 0,18

hope helped

8 0

2 years ago