The US national debt was 2.9617×10 power of 13 and 2021 and 3.98×10 power of 11 and 1971 find how much the depth increased in the 50 year period. Would the answer be 1.0183×10 power of 24 or 3.0015×10 power of 1313 or 29219×10 power of 11 or 2.9219×10 power 13.

Answer 1

To find how much the US national debt increased from 1971 to 2021, you need to subtract the debt in 1971 from the debt in 2021.

The values given are:

• National debt in 2021: \( 2.9617 \times 10^{13} \)
• National debt in 1971: \( 3.98 \times 10^{11} \)

Now let's perform the subtraction.

First, express both numbers in the same exponent form for easier calculation. You can express \( 3.98 \times 10^{11} \) with an exponent of \( 10^{13} \):

\[ 3.98 \times 10^{11} = 0.0398 \times 10^{13} \]

Now you can perform the subtraction:

\[ 2.9617 \times 10^{13} - 0.0398 \times 10^{13} = (2.9617 - 0.0398) \times 10^{13} = 2.9219 \times 10^{13} \]

So, the increase in the national debt over the 50-year period is \( 2.9219 \times 10^{13} \).

Therefore, the correct answer is \( 2.9219 \times 10^{13} \).