The function $$B\left(t\right)=10\cdot\ e^{0.2t}$$ models the balance of an investment account, in thousands, after $$t$$ years. Write and solve an equation to find the PRECISE time until the balance reaches $40,000.

$$\frac{\ln\left(4\right)}{0.2}$$ years

$$\frac{\ln\left(4000\right)}{0.2}$$ years

The growing population of two countries are modeled by $$X\left(t\right)$$ and $$Y\left(t\right)$$ whose graphs are shown. What is the meaning of their intersection?

The intersection signifies when the populations are the same.

The intersection signifies when they're growing by the same factor.

The intersection means that they started with the same initial population.

The intersection shows that the populations will never be equal.

The growing population of two countries are modeled by $$X\left(t\right)$$ and $$Y\left(t\right)$$ whose graphs are shown. The y-coordinate is $$359.1$$ . What other information do we NEED in order to SOLVE for the x-coordinate of the intersection?

An expression for $$X\left(t\right)$$

An expression for $$Y\left(t\right)$$

BOTH the expressions for $$X\left(t\right)$$ and $$Y\left(t\right)$$

Unit 4 Lessons 15-17 Practice

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Unit 4 Lessons 15-17 Practice

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Mathematics

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11th Grade

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CCSS

HSF.BF.B.5, HSF-IF.C.7E

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Isabel Ruiz

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1.4

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CCSS.HSF.BF.B.5

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30 sec • 1 pt

2.1

1.4

1.8

The graph does not show.

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CCSS.HSF.BF.B.5

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30 sec • 1 pt

True

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CCSS.HSF.BF.B.5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

True

False

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CCSS.HSF.BF.B.5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

True

False

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CCSS.HSF.BF.B.5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The graph doesn't show.

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