Question

Subtract 4.66 x 10^-5 - 7.34 x 10^-7

Answer 1

The U.S. national debt was $2.9617 x 10^13 in 2021 and $3.98 x 10^11 in 1971. Find how much the debt increased in the 50-year period.

Answer 2

The size of a hydrogen atom is about 1.2 x 10^-10m across. The size of an oxygen atom is 0.00000000152 m across. What is the difference between the sizes of these atoms in scientific notation?

Answer 3

To subtract these two numbers, we need to ensure that they have the same exponent.

First, let's convert both numbers to scientific notation with the same exponent:

4.66 x 10^-5 = 0.0000466
7.34 x 10^-7 = 0.000000734

Now we can subtract them:

0.0000466 - 0.000000734 = 0.000045866

Therefore, 4.66 x 10^-5 - 7.34 x 10^-7 = 0.000045866.

Answer 4

To find the increase in the U.S. national debt over the 50-year period, we need to subtract the debt in 1971 from the debt in 2021.

$2.9617 x 10^13 - $3.98 x 10^11 = $2.9649 x 10^13

Therefore, the U.S. national debt increased by $2.9649 x 10^13 over the 50-year period.

Answer 5

To find the difference between the sizes of the hydrogen atom and the oxygen atom, we need to subtract the size of the hydrogen atom from the size of the oxygen atom.

0.00000000152 m - 1.2 x 10^-10 m

Since these two numbers already have different exponents, we can perform the subtraction as is:

0.00000000152 m - 1.2 x 10^-10 m = -9.9988 x 10^-11 m

Therefore, the difference between the sizes of the hydrogen atom and the oxygen atom is approximately -9.9988 x 10^-11 m.