jdh3010

77.5/3.09*10^19

=2.5080906148867313915857605177993527 5080906148867313915857605177993527...*10^18

(5080906148867313915857605177993527) repeating

0.667*100=667*10^(-1)

1.236*100=1236*10^(-1)

425/1000=425*10^(-3)

0.667*10=667*10^(-2)

1. Find a number that you can multiply by the bottom of the fraction to make it into any 1 followed by 0s.

2. Multiply both top and bottom by that number. 

3. Write down just the top number and put the decimal point in the right spot.

eg)  $${\frac{{\mathtt{63}}}{{\mathtt{125}}}} = {\frac{\left({\mathtt{63}}{\mathtt{\,\times\,}}{\mathtt{8}}\right)}{\left({\mathtt{125}}{\mathtt{\,\times\,}}{\mathtt{8}}\right)}} = {\frac{{\mathtt{504}}}{{\mathtt{1\,000}}}} = {\mathtt{0.504}}$$

x^2+4x-16=0

The derivation for the quadratic equation is 

Substitute a=1, b=4, c=-16

So, the answer is x=-2(1+sqrt(5)) or 2(sqrt(5)-1).

163 is a prime number.

163=1^2+9^2+9^2

163=2^7+35

5.97 times 10 to the -6 divided by 10

→ $${\frac{{\mathtt{5.97}}}{\left({{\mathtt{10}}}^{{\mathtt{6}}}{\mathtt{\,\times\,}}{\mathtt{10}}\right)}}$$ = $${\mathtt{5.97}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{\left(-{\mathtt{7}}\right)}$$

In decimal form: 0.000000597

6*5-56=30-56=-26

4y^2-9y+2=(4y-1)(y-2)