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Degger [83]
2 years ago
6

Avery invested $200 in an account paying an interest rate of 6 7/8%

Mathematics
2 answers:
Maslowich2 years ago
5 0

Answer:

0.73 yrs

Step-by-step explanation:

if t is time in years

quarterly

600 = 200(1 + 0.06625/4)^4t

3 = (1 + 0.06625/4)^4t

ln3 = 4tln(1. + 06625/4)

t = ln3 / (4ln1.0165625)

t = 16.7198 yrs

continuously

600 = 200e^(0.06875t)

3 = e^(0.06875t)

ln3 = 0.06875t

t = ln3 / 0.06875

t = 15.9798 years

Δt = 16.7198 - 15.9798 = 0.73 yrs

ElenaW [278]2 years ago
4 0

Answer:

15

Step-by-step explanation:

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3 years ago
Jill is shopping at a department store that is having a sale this week. The store has advertised 15% off certain merchandise. Ji
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Answer:

The simpler way is:

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Step-by-step explanation:

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This is the general formula.

In this case, we know that the store has advertised 15% off, then we have X% = 15%

Then if:

SP = sales price

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We will have the equation:

SP = RP - (15%/100%)*RP = RP - 0.15*RP

This is what Jill found, but if we use the general equation above, we will find that:

SP = RP*(1 - 15%/100%) = RP*(1 - 0.15) = RP*0.85

So we just need to multiply the regular price by 0.85 to get the sales price.

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