ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Powers and Exponents Videos 6 videos

Powers
2656 Views

Numbers have friends in high places: they're called powers. And yes, they are powerful. They can make a single digit number turn into a 10 digit nu...

Multiplication and Division Properties of Exponents
1002 Views

Exponents desperately want to be like regular ol' numbers—so it figures they also want to be multiplied and divided.

Fractional Exponents
3012 Views

Those itty-bitty exponents are difficult to read as it is. Now they're going to be even smaller—and include fractions? Someone had better get us...

See All

SAT Math 1.4 Numbers and Operations 211 Views


Share It!


Description:

SAT Math 1.4 Numbers and Operations. Solve the equation.

Language:
English Language

Transcript

00:02

And here's your shmoop du jour...

00:04

What is 1.2 times 10 to the fifth over 2.4 times 10 to the 8th?

00:08

Here are the potential options...

00:12

You're probably reaching for your calculator right now, but no calculator necessary here.

00:16

In order to solve this unholy mess of numbers,

00:20

we need to split it into its parts: 1.2 divided by 2.4 is 0.5.

00:26

Our exponent rules tell us that dividing numbers with exponents

00:30

means subtracting the exponents themselves.

00:34

5 - 8 = -3 and we have 0.5 times 10 to the negative third.

00:41

0.5 times 10 to the negative third is equal to zero-point-zero-zero-zero-five...

00:49

...so (A) is the correct answer.

Related Videos

SAT Math 2.1 Geometry and Measurement
2779 Views

SAT Math 2.1 Geometry and Measurement. What is the measure of angle z in terms of x and y?

SAT Math 9.4 Algebra and Functions
1300 Views

SAT Math 9.4 Algebra and Functions

SAT Math 9.2 Algebra and Functions
377 Views

SAT Math 9.2 Algebra and Functions

SAT Math: Identifying an Equation for the Average of Two Percentages
23 Views

In 2014, the unemployment rate of one county in California was 7%. In another county, the unemployment rate was 11%. Which of the following express...

SAT Math: Which Equation Represents Profit?
13 Views

Angela is making cookies for a bake sale. She expects each batch of her cookies to sell for $40. It costs her $10 to make one batch of cookies, and...