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3 years ago

Can somebody help me with number 8?

Mathematics

1 answer:

iVinArrow [24]3 years ago

8 0

Yes, it is a rational number. This is because rational numbers are any number that can be expressed as a fraction where the numerator and denominators are whole numbers. 13/3 does not need to be expressed as a decimal for you to know this.

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What is a possible scale factor for the dilation of the quadrilateral ABCD?

slamgirl [31]

Answer:

$\dfrac {1}{2}$

Step-by-step explanation:

According to the diagram

The center is o

Then Distance from O to B'C'=1

Distance from O to BC=1+1=2

$\therefore\sf Ratio\:is\:1:2.$

<h3>More to know:-</h3><h3>Formulas related to surface area and volume:-</h3>

$\begin{array}{|c|c|c|}\cline{1-3}\bf Shape&\bf Volume\ formula&\bf Surface\ area formula\\\cline{1-3}\sf Cube&\tt l^3}&\tt 6l^2\\\cline{1-3}\sf Cuboid&\tt lbh&\tt 2(lb+bh+lh)\\\cline{1-3}\sf Cylinder&\tt {\pi}r^2h&\tt 2\pi{r}(r+h)\\\cline{1-3}\sf Hollow\ cylinder&\tt \pi{h}(R^2-r^2)&\tt 2\pi{rh}+2\pi{Rh}+2\pi(R^2-r^2)\\\cline{1-3}\sf Cone&\tt 1/3\ \pi{r^2}h&\tt \pi{r}(r+s)\\\cline{1-3}\sf Sphere&\tt 4/3\ \pi{r}^3&\tt 4\pi{r}^2\\\cline{1-3}\sf Hemisphere&\tt 2/3\ \pi{r^3}&\tt 3\pi{r}^2\\\cline{1-3}\end{array}$

6 0

3 years ago

The ratio of the corresponding linear measures of two similar cans of fruit is 4 to 7. The smaller can has a surface area of 220

Oxana [17]

4/7=220/x. multiply 220 by 7 then divide by 4. x=385 square centimeters.

5 0

3 years ago

I need help with number 13, PLEASE. Extra points!

gladu [14]

Answer:

90°, 270°

Step-by-step explanation:

2r sin(Ф/2) = c

2r sin (Ф/2) = √2r

divide both sides by 2r

sin (Ф/2) = √2r/2r

sin(Ф/2) = √2/2

From the unit circle sin is √2/2 at 45°, and 135°

so Ф/2 = 45

Ф=90°

and Ф/2 = 135

Ф= 270°

5 0

3 years ago

Students took a typing test. The number of words per minute students could type are listed below. 40, 47, 25, 32, 48, 55, 33, 56

const2013 [10]

Answer:

Step-by-step explanation:

The median number is known as the middles number

The first step is to rearrange the set of numbers starting from the lowest

25, 32, 32, 32, 33, 40, 47, 47, 48, 55, 56

Hence the middle number is 50

8 0

3 years ago

Dan tan 31 miles more than Jennifer last week. Dan ran 138 miles. How many miles did Jennifer run?

PtichkaEL [24]

Solution:
138-31= 107 miles

7 0

3 years ago

Read 2 more answers