Astron. Math

Question 0

1 light year ~ 9.46 x 10^12km=

Answer 0

9.46x 10^15m

Question 1

1 AU = 1.496 x 10^8 km =

Answer 1

1 AU 1.496 X 10^11m

Question 2

1 parsec (pc) ~3.09 x 10^13 km=

Answer 2

3.26 light years

Question 3

Powers of 10 means how many times to

Answer 3

Multiply 10 by itself. 10^2 = 10x10=100

or a 1 with that number of zeros behind it.

Question 4

A negative exponet tells how many places to the —— of the decimal point , including the 1 so10^-6 is 0.000001

Answer 4

Right

Question 5

multiplying powers of 10 requires —–exponets

Answer 5

Adding . 10^4 x 10^5 =10^9

Question 6

Dividing exponets of ten mean ——– exponents
10^5
10^3

Answer 6

subtracting

Question 7

(10^4)^3 Power of Powers

Answer 7

10^12

Question 8

square root of 10^4, =(10^4) 1/2=10^4(1/2)

Answer 8

10^2

Question 9

There is NO shortcut for adding and subtracting powers of 10
Must be written long hand.
10^6 +10^2 = 1,000,000 + 100=1,000,100.00

Answer 9

True.

10^8 +10^-3+ 100,000,000. +.001=100,000,000.001

Question 10

Format in which a number between 1 and 10 is multiplied by a power of 10 is

Answer 10

Scientific Notation. 6 X10^6 or 6,000,000.

Question 11

Convert number to a scientific notation. a —- step process

Answer 11

2. Move the decimal point to come after the first NON zero digit
   The number of places it moved tells you the power of ten, the power is POSITIVE it it moves to the left, and Negative if it moves to the right. 3042 3.042 x 10^3. We want as few digits in front of decimal as possible.

Question 12

convert a number from scientific notation

The power of 10 indicates how many place to move the decimal point; move it to RT if power of 10 is positve. to left if Neg
If moving the decimal point creates any open places, fill them with zeros

Answer 12

4. 01 x 10^2 =401 two to the right

5. 7 x 10^-3 = 5.7 x negative 1000=0.0057 moved three to the left