Question

1. write this number in scientific notation. 692,035,000,000
2. solve the equation. 18 - (2x + 4) = 5

Explanation:

Step1: Rewrite in scientific - notation

Move the decimal point to get a number between 1 and 10. For 692035000000, moving the decimal 11 places to the left gives 6.92035. Then multiply by 10 to the power of the number of places moved.
$692035000000 = 6.92035\times10^{11}$

Step2: Solve the equation

First, simplify the left - hand side of the equation $18-(2x + 4)=5$.
$18-2x - 4=5$
$14-2x = 5$
Subtract 14 from both sides:
$-2x=5 - 14$
$-2x=-9$
Divide both sides by - 2:
$x=\frac{-9}{-2}=\frac{9}{2}=4.5$

Answer:

1. $6.92035\times10^{11}$
2. $x = 4.5$