Lesson 2.2 Use Powers of 10 to Estimate Quantities

Front

What is the scientific notation for 40,000,000,000?

Back

4 \times 10^{10}

Front

What is the scientific notation for 0.000000004?

Back

4 \times 10^{-9}

Front

How many times faster does a bee flap its wings than a hummingbird if a bee flaps its wings about 8.28 \times 10^4 times an hour and a hummingbird flaps its wings about 28,800 times an hour?

Back

about 3 times faster

Front

What is the scientific notation for 0.00004?

Back

4 \times 10^{-5}

Front

Express 0.0001 as a single digit times a power of ten.

Back

1 \times 10^{-4}

Front

What is the definition of scientific notation?

Back

A way of expressing numbers that are too large or too small to be conveniently written in decimal form.

Front

What is the general form of scientific notation?

Back

a \times 10^n, where 1 \leq a < 10 and n is an integer.

Front

How do you convert a number to scientific notation?

Back

Move the decimal point to create a number between 1 and 10, then count the number of places moved to determine the exponent.

Front

What does a positive exponent in scientific notation indicate?

Back

The number is greater than 1.

Front

What does a negative exponent in scientific notation indicate?

Back

The number is less than 1.