The U.S. national debt was $2.9617×10^13 in 2021 and $3.98×10^11 in 1971. Find how much the debt increased in the 50-year period. (1 point)

Answer 1

To find how much the debt increased in the 50 year period, we need to subtract the national debt in 1971 from the national debt in 2021.

$2.9617×10^13 - $3.98×10^11 = $2.9617×10^13 - $0.398×10^13

To subtract the terms with exponents, we need to make sure they have the same base. In this case, we can rewrite $0.398×10^13 as $3.98×10^12.

$2.9617×10^13 - $3.98×10^12

Now we can subtract the terms:

$2.9617×10^13 - $3.98×10^12 = $2.5617×10^13

So, the U.S. national debt increased by $2.5617×10^13 in the 50-year period.

Answer 2

Subtract 4.66×10−5^−7.34×10^−7 (1 point)

Answer 3

To subtract these numbers, we need to have the same base for the exponents. In this case, both numbers are written in scientific notation, so we can subtract them by subtracting the coefficients and keeping the same base and exponent.

4.66×10^(-5) - 7.34×10^(-7)

= (4.66 - 0.0734) × 10^(-5)

= 4.5866 × 10^(-5)

So, the result of the subtraction is 4.5866 × 10^(-5).

Answer 4

China and India are the most populous countries in the world. China’s population is approximately 1.45×10^9 , while India’s population is approximately 1,400,000,000. How many more people live in China than in India?(1 point)
Responses

Answer 5

To find out how many more people live in China than in India, we need to subtract India's population from China's population.

China's population is approximately 1.45×10^9.
India's population is approximately 1,400,000,000.

To simplify the calculation, we can convert China's population to the standard notation:

1.45×10^9 = 1,450,000,000

Now we can subtract India's population from China's population:

1,450,000,000 - 1,400,000,000 = 50,000,000

Therefore, there are 50,000,000 more people living in China than in India.