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2 years ago

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A map shows a scale of 5cm = 40 miles. The distance from Los Angeles, CA to San Francisco, CA is 400 miles. How far apart will t

he two cities be on the map? A 0.5 cm B 5 cm C 50 cm D 500 cm

1 answer:

nadezda [96]2 years ago

8 0

Answer:

C. 50cm

Step-by-step explanation:

40 * 10 = 400miles

5 * 10 = 50cm

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2 years ago

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$I = P_0rt$

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_______________________________________________

<u><em>For the first account</em></u> r = 0.07 per year.

Then the formula is:

$I_1 = P_1r_1t$

Where

$P_1$ is the initial amount in account 1 at a rate $r_1$ during t = 1 year

$I_1 = P_1(0.07)(1)\\\\I_1 = 0.07P_1$

<u><em>For the second account </em></u>r = 0.05 per year.

Then the formula is:

$I_2 = P_2r_2t$

Where

$P_2$ is the initial amount in account 2 at a rate $r_2$ during t = 1 year

Then

$I_2 = P_2(0.05)(1)\\\\I_2 = 0.05P_2$

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So

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$1,280 = 0.07P_1 + 0.05P_2$

As the total amount that was invested was $20,000 then

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Then we multiply the second equation by -0.07 and add it to the first equation:

$0.07P_1 + 0.05P_2 = 1.280\\.\ \ \ \ \ \ \ \ +\\-0.07P_1 -0.07P_2 = -1400\\-------------$

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Then $P_1 = 14,000$

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3 years ago