zacismyname

... you could use a calculator for this

sin(0.22) ≈ 0.003839714919

Well...

1cm = 10mm

1cm^2 = 100mm^2

so 8cm^2 = 800mm^2

y=4^x is exponential

$$1\frac{4}{25}\times{2\frac{3}{20}}$$  First change them into impropper fractions

$$\frac{29}{25}\times\frac{43}{20}$$  Multiply the numerators and denominators

$$\left({\frac{{\mathtt{29}}}{{\mathtt{25}}}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{43}}}{{\mathtt{20}}}}\right) = {\frac{{\mathtt{1\,247}}}{{\mathtt{500}}}} = {\mathtt{2.494}}$$

Well I like to show the in-between steps because I think it makes it easier to understand but once you know the rule you can just cut straight to the answer.

For example:

$${\frac{{\mathtt{x}}}{{{\mathtt{2}}}^{-{\mathtt{3}}}}}$$

$${\frac{{\mathtt{x}}}{\left({\frac{{\mathtt{1}}}{{{\mathtt{2}}}^{{\mathtt{3}}}}}\right)}}$$

$$\left({\frac{{\mathtt{x}}}{{\mathtt{1}}}}\right){\mathtt{\,\times\,}}\left({\frac{\left({{\mathtt{2}}}^{{\mathtt{3}}}\right)}{{\mathtt{1}}}}\right)$$

$${{\mathtt{2}}}^{{\mathtt{3}}}{\mathtt{\,\times\,}}{\mathtt{x}}$$

I dare someone to write down all the digits 

Pay = 0.05*Sales + 1,250

Pay = 0.05*350,000 + 1,250

Pay = 17,500 + 1,250

Pay = $18,750.00

What is the question?

(7*3/7+3) ÷ 4 ≠ 0  (multiply by 4)

7*3/7 + 3 ≠ 0

21/7 + 3 ≠ 0

3 + 3 ≠ 0

6 ≠ 0

So this expression is false. 

1% of 14 billion ------> 0.01 * 14,000,000,000 ---------> 140,000,000