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Luda [366]
3 years ago
9

Andrew has a four-year college loan for $20,000. The lender charges a simple interest rate of 5 percent. How much interest will

he have to pay? simple interest = P × r × t A. $800 B. $4,000 C. $10,000
Physics
1 answer:
atroni [7]3 years ago
7 0

Answer:

B. $4,000

Explanation:

The formula for the simple interest is

interest = P\cdot r \cdot t

where

P is the principal

r is the interest rate

t is the number of years

In this problem,

P = 20,000 $

r = 0.05

t = 4 years

So the interest is

P=(20,000 $)(0.05 )(4)=4,000 $

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As shown in the figure below, a seal and the penguin are playing a fun game of tag. The penguin first swims rightward
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Answer:

Explanation:

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3 years ago
At which angle do wires have to be to experience full force? What happens at other angles?
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8 0
2 years ago
The security alarm on a parked car goes off and produces a frequency of 960 Hz. The speed of sound is 343 m/s. As you drive towa
Greeley [361]

Answer: 13.4\ m/s

Explanation:

Given

The frequency of the source is f_o=960\ Hz

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Doppler frequency is given by

f'=f_o\left(\dfrac{c\pm v_o}{c\pm v_s}\right)

Here, the source is at rest

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f_1=f_o\left(\dfrac{c+v}{c}\right)\quad \ldots(i)

While leaving, frequency is

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The difference in the frequency is

\Rightarrow f_1-f_2=75\\\\\Rightarrow f_o\left(\dfrac{c+v}{c}\right)-f_o\left(\dfrac{c-v}{c}\right)=75\\\\\Rightarrow f_o\left(\dfrac{2v}{c}\right)=75\\\\\Rightarrow v=\dfrac{75\times 343}{2\times 960}\\\\\Rightarrow v=13.39\approx 13.4\ m/s

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2 years ago
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