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Following order of operations, multiplication -> division.

6x2 = 12

12 / 3 = 4

Formula is C = 2pi * radius.

C = 2π(4)

C = 25.1

There's a calculator on the home page of the website, but 735/14 = 52.5.

Simply enter it in like "2/5" or "(2/5)".

Parallel lines are lines that have the same slope, so yes.

Sorry for the late response, but just in case you still need help...

sin = opposite / hypotenuse

12*sin(25) = opposite side

cos = adjacent/hypotenuse

12*cos(25) = adjacent side

Density = mass / volume.

First you need to find the volume of the cube block, which is V = s³.

v = (3)³ = 27

density = 27cm/27g

density = 1

That's a weird value to convert to a percentage.

1 = 100%. Simply multiply the decimal value by 100.

277.070 x 100 = 27,707%

If you're asking how to do inverse cosine on the web2.0calc, hit the "2nd" button in the top left corner and the sin/cos/tan buttons will switch to the inverse versions. (acos is inverse).

6:00 - 5:39 = 21 minutes.

6:11 - 6:00 = 11 minutes.

21+11 = 32 minutes.

There is a button labeled "x^y". If you want say, 2⁹, simply enter 2, hit x^y, and hit 9.

1000x1000 = 1 million!

Hi. There's an easy way to do this with trigonometry, but I don't know if you need to solve it using trig or not, so I'll just help in the simpler way.

As I'm sure you know, angles that make up a horizontal line have to add up to 180 degrees. Therefore, the angle next to 139 must be 41, because 180-139 = 41. 

A triangle's angles add up to 180, so 77+41 = 118, and 180 - 118 = 62. Therefore, c = 62 degrees.

Now that we have c, we can get b, because they form a horizontal line together. 

c = 62, so 180 - 62 = 118 degrees (b).

a is an opposite angle of the 36 degrees at the bottom, so a = 36 degrees.

To summarize: a= 36, b = 118, c = 62.

Hope that helps you understand it better.

The formula for area of a triangle is simply a=1/2 bh.

b = base

h = height

The height of the triangle is the length from a pointy end of the triangle to an opposite side. The base is just the length of the bottom side of the triangle. Here's a picture

3 to the power of 3 = 3x3x3

3x3 = 9, and 9x3 = 27