Question

Kory calculated several numbers in his calculator. The result displayed 1.3E-2 on the calculator screen. Which equivalent number(s) does this represent? Select all that apply. 13 × 102 130 0.013 1.3 × 10-2 -0.013

Answer 1

Option 3 -
`1.3E-2=0.013`

option 4 -
`1.3E-2=1.3* 10^(-2)`

Explanation:

Given : Kory calculated several numbers in his calculator. The result displayed 1.3E-2 on the calculator screen.

To find : Which equivalent number(s) does this represent?

Solution :

The result displayed 1.3E-2 on the calculator screen is written in scientific notation where E represents 10 to the power.

So, We can write 1.3E-2 in standard notation,

`1.3E-2=1.3* 10^(-2)`

or
`1.3E-2=(13)/(10)* (1)/(100)`

`1.3E-2=0.013`

Therefore, Option 3 and 4 are equivalent.

Answer 2

• 0.013
• 1.3×10^(-2)

Explanation:

Many calculators use "E" to signify "×10^( )". Thus ...

... 1.3E-2 = 1.3×10^(-2)

This number in scientific notation is equivalent to the standard form number ...

... 1.3×0.01 = 0.013