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DedPeter [7]
3 years ago
8

When round off to nearest thousand, the number 42,099​

Mathematics
2 answers:
vodka [1.7K]3 years ago
5 0
42,000 would be the correct answer for this question. Since the 2 isn’t greater than 5 everything behind it changes to 0
Roman55 [17]3 years ago
3 0

Answer:42000

Step-by-step explanation:

There is no number higher than 5 after the thousands so you would keep it the same

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Cheryl drove 4 hours at a constant rate to travel 160 miles. At what rate did she drive? A. 20 mph B. 35 mph C. 40 mph D. 72 mph
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Answer:

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Step-by-step explanation:

you take your miles 160 and divide them by 4 which is going to be 40

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The product of two numbers is 30 if one of the numbers is six over 11 what is the other number
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Let a, b, and c be constants, and let x be a variable. Which of the following is
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Answer:

C

Step-by-step explanation:

We have:

a(x+b)

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Notice that a<0. Therefore, a is negative. Hence, we must flip the sign since we are dividing by a negative. This yields:

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S_A_V [24]
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Suppose a population is growing by 8% each year. How many years will it take the population to double?
Doss [256]

ANSWER

\text{9 years}

EXPLANATION

We want to find the number of years that it will take the population to double.

To do this, we have to apply the exponential growth function:

y=a(1+r)^t

where y = final value

a = initial value

r = rate of growth

t = time (in years)

For the population to double, it means that the final value must be 2 times the initial value:

y=2a

Substitute the given values into the function above:

\begin{gathered} 2a=a(1+\frac{8}{100})^t \\ \frac{2a}{a}=(1+0.08)^t=1.08^t \\ 2=1.08^t \end{gathered}

To solve further, convert the function from an exponential function to a logarithmic function as follows:

\log _{1.08}2=t

Solve for t:

\begin{gathered} \frac{\log _{10}2}{\log _{10}1.08}=t \\ \Rightarrow t=9\text{ years} \end{gathered}

It will take 9 years for the population to double.

4 0
1 year ago
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