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2 Write the following in standard forma 4.0 x 10 =b. 3.8 x 10=C 9.2 x 10 =d 15 x 10 =

User Eudoxos
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Answer:

a. 4.0 x 10^5 = 400000

b. 3.8 x 10^(-4) = 0.00038

c. 9.2 x 10^8 = 920000000

d. 1.5 x 10^(-7) = 0.00000015

Step-by-step explanation:

To write the numbers in standard form we will use the following rule:

• If the exponent of 10 is positive, we will move the decimal point to the right

• If the exponent of 10 is negative, we will move the decimal point to the left

Then, for each part, we get:

a. 4.0 x 10^5

Since 5 is positive, we need to move the decimal point 5 places to the right, this is equivalent to add 5 zeros to number 4, so we get:

4.0 x 10^5 = 400000

b. 3.8 x 10^(-4)

We need to move the decimal point 4 places to the left, so:

3.8 x 10^(-4) = 0.00038

In the same way, we get:

c. 9.2 x 10^8 = 920000000

d. 1.5 x 10^(-7) = 0.00000015

So, the answers are:

a. 4.0 x 10^5 = 400000

b. 3.8 x 10^(-4) = 0.00038

c. 9.2 x 10^8 = 920000000

d. 1.5 x 10^(-7) = 0.00000015

User Yuit
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