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Pavel [41]
3 years ago
15

The difference between a country's exports and imports is called the country's trade balance. If one country had a trade balance

of - $86 billion in 1991, $142 billion in
1995, and - $43 billion in 1994. What was the total trade balance for these years?
A. -271 billion dollars
OB. 271 billion dollars
O C. 13 billion dollars
O D . -13 billion dollars
Mathematics
1 answer:
liq [111]3 years ago
8 0

Answer:

C: 13 billion dollars

Step-by-step explanation:

- 86 + 142 - 43 = 13 billion dollars

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Ian tosses a bone up in the air for his dog, Spot. The height, h, in feet, that Spot is above the ground at the time t seconds a
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Answer:

12 feet per second.

Step-by-step explanation:

Please consider the complete question.

Ian tosses a bone up in the air for his dog, Spot. The height, h, in feet, that Spot is above the ground at the time t seconds after she jumps for the bone can be representedh(t)=-16t^2+20t.

What is Spot's average rate of ascent, in feet per second, from the time she jumps into the air to the time she catches the bone at t=1/2?  

We will use average rate of change formula to solve our given problem.

\text{Average rate of change}=\frac{f(b)-f(a)}{b-a}

\text{Average rate of change}=\frac{h(\frac{1}{2})-h(0)}{\frac{1}{2}-0}

\text{Average rate of change}=\frac{-16\cdot(\frac{1}{2})^2+20\cdot \frac{1}{2}-(-16\cdot(0)^2+20\cdot (0))}{\frac{1}{2}-0}

\text{Average rate of change}=\frac{-16\cdot\frac{1}{4}+10-(0)}{\frac{1}{2}}

\text{Average rate of change}=\frac{-4+10}{\frac{1}{2}}

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\text{Average rate of change}=12

Therefore, Spot's average rate of ascent is 12 feet per second.

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2 years ago
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In a Farm, there are:
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