The U.S. population in 1990 was approximately 250 million, and the average growth rate for the past 30 years gives a doubling time of 66 years. The above formula for the

United States then becomes
P (in millions) = 250 times 2( y-1990)/66

What will the population of the United States be in 2025 if this
growth rate continues?

Did I do this correct

P=250*2^(2025-1990)/66
p=250*2^35/66
p=250*2^.53
p=250*1.444
p=361 million

is this correct if not please explain what i did wrong

i don't think that it is (2^),isn't it suppose to be times by two?
so,

P=250*(2*(2025-1990)/66)
P=250*(2*(35/66))
P=250*1.06
P=?
and you have your final answer here! =)

carry, you are right.

It seems like there was a mistake in your calculation. The correct formula to use is P = 250 * 2^((y - 1990)/66) where y represents the year.

To find the population of the United States in 2025 using this formula, you would substitute y with 2025:

P = 250 * 2^((2025 - 1990)/66).

Calculating this equation, we get:

P = 250 * 2^(35/66).

To evaluate 2^(35/66), you need to raise 2 to the power of 35 and then take the square root of that result raised to the power of 66. This can be done using a calculator or spreadsheet software.

After evaluating 2^(35/66), you can multiply the result by 250 to find the population:

P = (2^(35/66)) * 250.

The final answer would be the result of this calculation.