Search Results
Math Topics
College Algebra
Algebra Review
1
The Real Number System
Write each of the following in symbols:
The sum of \(x\) and \(5\) is less than \(2\).
The product of \(3\) and \(x\) is \(21\).
The quotient of \(y\) and \(6\) is \(4\).
Twice the difference of \(b\) and \(7\) is greater than \(5\).
The difference of twice \(b\) and \(7\) is greater than \(5\).
2
Integer Exponents and Scientific Notation
Simplify each expression and write it using positive exponents. Assume that variables represent nonzero real numbers.
\(\dfrac{16x^{10}y^4}{4x^{10}y^8}\)
\(\dfrac{\left(3x^{-2}\right)^3}{x^{-5}}\)
\(\left(\dfrac{54s^2t^{-3}}{6zt}\right)^{-2}\)
In 2012, Japan had a population os \(1.27\times 10^8\) and a land area of \(3.64\times 10^5\) square kilometers. What is the population density of Japan, that is, the number of people per square kilometer of land? Express your answer in scientific notation.