Chapter 7 Exponents and Scientific Notation

Simplify 4^-2= 

• 1/16

• -16

• 1/4

• -42

What is scientific notation?

• A long way to write really short numbers

• A short way to write really large or really small numbers

• None of the above

UNDERSTANDING
If the exponent is a negative number...

• you will get a large number

• you will get a small number

The first number in scientific notation must be...

• between 0 and 100

• between 1 and 100

• between 0 and 10

• between 1 and 10

Which of the following is correct scientific notation?

• 20.35 x 10⁴

• .2035 x 10⁴

• 2035 ⁴

• 2.035 x10⁴

• 0.5 x 10³            

• 0.5 x 10⁴

• 5 x 10³

• 5 x 10⁴

Evaluate   (5.8 x 10⁶) – (5.7 x 10⁵)

• 1

•  5.23 x 10^-6

• 1 x 10⁶           

• 5.23 x 10⁶

What do you do to the exponents to simplify the expression (b⁴)⁶ ?

• add

• subtract

• multiply

• divide

Which number is greater?   2.5 x 10^-3   or   1.8 x 10^-2

• 2.5 x 10^-3      

• 1.8 x 10^-2      

 A passenger plane travels at about 7 x 10² feet per second. The plane takes 3 x 10⁴ seconds to reach its destination. About how far must the plane travel to reach its destination? Write your  answer in scientific notation.

• 21 x 10⁶ feet

• 307 x 10²      

• 2.1 x 10⁷  feet  

• 3.07 x 10⁴ feet