Sunday, April 28, 2013

Help in Math Now

Introduction to help in math now:

Online Tutoring is one of the best way for getting help in various subjects. Tutor Vista is the best choice for getting help not only in math but also in English and Science.

In this article of help in math now, several problems related to various branches of mathematics are given with their respective answer. In addition, several practice problems are given with answer key which helps for better understanding.


Get help in math now through examples:


Example 1:

Find the Mean of the given data set: { 8, 9, 21, 12 }

Solution:

Mean   =  ( 8 + 9 + 21 + 12 ) / 4

=  50 / 4

= 12.5

Answer: Mean  = 12.5

Example 2:

Find the volume of cylinder given the radius is 23 cm and 42 cm.

Solution:

Volume of cylinder = `pi` r2 h cubic units.

= (3.14) * 232 * 42

=  3.14 * 529 * 42

=  69764.52 cm3

Answer: Volume of cylinder = 69764.52 cm3

Example 3:

Find the area of the square with the side length of 12 cm.

Solution:

Area of square  =  ( a ) 2

= ( 9 )2

= 12 * 12

= 144 cm^2

Answer: Area of square =  144 cm^2

Example 4:

Find the area of a triangle through base of 4 m and a height of 2 m.

Solution:

Area of a triangle = ½ b h

= ½ ( 4 ) ( 2 )

= 0.5 * 4 * 2

= 4 m2

Answer: Area of triangle = 4 m2

Example 5:

Solve :  3 ( x + 3 ) = 30

Solution:

3( x + 3 )  =  30

x + ( 3 x 3 )  =  30

3x + 9  =  30

3x  =  21

x  =  7

Answer:  x =  7

Example 6:

Find lateral surface area of cone with radius 10 cm and slant height 20 cm.

Solution:

Given:  Radius r =10 cm

Slant height l = 20 cm

Lateral surface area  = `pi` r l   square units.

= 3.14 x 10 x 20

= 628 cm^2

Answer: Lateral surface area = 628 cm^2



Example 7:

Find the range of the data set { 5, 12, 43, 25, 41 }

Solution:

Here, The maximum value is 43

The minimum value is 5

Range  =  Maximum value – Minimum value

=  43 – 5

= 38

Answer: Range  = 38

Having problem with is the square root of 5 a rational number keep reading my upcoming posts, i will try to help you.

Get help in math now through practice problems:


1) Find the range of the data set { 25, 55, 29, 32, 19 }

Answer: 36

2) Find the area of the square with the side length of 17 cm.

Answer: 289 cm^2

3) Find the Mean of the given data set: { 2, 7, 8, 11 }

Answer: 7

4) Find lateral surface area of cone with radius 4 cm and slant height 12 cm.

Answer: 150.72 cm^2

No comments:

Post a Comment