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3 years ago

Find the missing number. 30,______ 19, 13 1/2.

Mathematics

1 answer:

Andru [333]3 years ago

5 0

The answer is 24.5 because $19-13 \frac{1}{2} = 5 \frac{1}{2}$ so you add 5.5 from 19 to get the answer

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In 2016 the United States had a population of about 323 million people and was growing at 0.7 %. Use an explicit exponential mod

ElenaW [278]

Answer:

2047

Step-by-step explanation:

We are given that

Growing rate=0.7%

$\frac{dp}{dt}=\frac{0.7}{100}P$

$\int \frac{dP}{P}=0.007\int dt$

$lnP=0.007t+C$

Using the formula

$\int \frac{dx}{x}=ln x+C$

$P=e^{0.007t+C}=e^{0.007t}\cdot e^C=Ae^{0.007t}$

$e^C=A$

Initially when t=0,P=323 million

Substitute the values

$323 million=A$

$P=323e^{0.007t}$

Now, substitute P=400 million

$400=323e^{0.007t}$

$ln\frac{400}{323}=0.007t$

$ln(1.2384)=0.007t$

$t=\frac{ln(1.2384}{0.007}$

$t=30.5\approx 31 Years$

Year=2016+31=2047

Hence,In 2047 the U.S population will reach 400 million people.

5 0

3 years ago

25 points! pls show work if can!!!!!!!!

Nataliya [291]

Answer: 8.4

Step-by-step explanation:

15-6.6

3 0

3 years ago

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babunello [35]

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3 years ago

What is the exact area of a circle with a radius of 11 feet?

Phoenix [80]

11 feet 121 PI square feet
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6 0

3 years ago

Round to the nearest cent.<br> 5. $406.439

boyakko [2]

Answer:

406.4

Step-by-step explanation:

When rounding you only look at the number you're rounding and the one before it. In this case it would be the 4 and 3 after the decimal since we're rounding to the nearest cent. If the numbers before the one you're rounding are 0-4 then you leave the number the same. If the numbers are between 5-9 then you add one to the number. Since the number before 4 is between 0-4 you leave it as 4. But if it was between 5-9 then you'd change the 4 to 5.

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3 years ago