Unit 1 Rational & Irrational Numbers Review

Front

What type of number is 3.14159265...?

Back

Irrational number

Front

Express 0.45 as a fraction.

Back

\frac{45}{100}

Front

In the formula for continuously compounded interest, A=Pe^{rt}, what value should be used for r if the interest rate is 3%?

Back

0.03

Front

Determine the area of a circle with a radius of 4 cm using 3.14 for \pi.

Back

50.24 cm²

Front

Estimate the value of \sqrt{3}.

Back

1.8

Front

Define a rational number.

Back

A rational number is any number that can be expressed as \frac{a}{b}, where a and b are integers and b ≠ 0.

Front

What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a simple fraction, meaning it cannot be written as \frac{a}{b}.

Front

What is the formula for the area of a circle?

Back

A = \pi r^2

Front

How do you convert a decimal to a fraction?

Back

To convert a decimal to a fraction, write the decimal over 1, multiply numerator and denominator by 10 for each digit after the decimal point, and simplify.

Front

What is the value of \pi to two decimal places?

Back

3.14