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krok68 [10]
2 years ago
6

Diane has been keeping an eye on an emerald ring she likes. Its original price was $22,090. After being marked down for a cleara

nce sale, it is now $13,254. By what percent has the price of the ring gone down?
Mathematics
1 answer:
xz_007 [3.2K]2 years ago
8 0

Answer:

40%

Step-by-step explanation:

.d.fnfjcnfjz s.d fndjehsh

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3 years ago
Fiona invested $1000 at 7% compounded continuously. At the same time, Maria invested $1100 at 7% compounded daily. How long will
Natali [406]

9514 1404 393

Answer:

  14,201 years

Step-by-step explanation:

The two compound interest formulas are ...

  A = P·e^(rt) . . . . . continuous compounding at rate r for t years

  A = P·(1 +r/365)^(365t) . . . . . daily compounding at rate r for t years

We went the amounts to be equal:

  1000·e^(0.07t) = 1100·(1+0.07/365)^(365t)

Dividing by 1000(1 +0.07/365)^(365t), we have ...

  ((e^0.07)/(1+0.07/365)^365)^t = 1.1

The base of the exponential on the left is ...

 ( e^0.07)/(1+0.07/365)^365 ≈ 1.00000671149321522

Taking logs, we have ...

  t×ln(1.00000671149321522) = ln(1.1)

  t = ln(1.1)/ln(1.00000671149321522) ≈ 0.09531018/(6.7114704·10^-6)

  t ≈ 14,201.09 . . . . . years

It will take about 14,201 years for the investments to be equal.

_____

<em>Additional comment</em>

The investment value at that time will be about $5.269·10^434. (That's a larger number than <em>anything</em> countable in the known universe, including energy quanta.)

These calculations are beyond the ability of many calculators, so might need to be carefully rewritten if the calculator only keeps 10 significant digits, or only manages exponents less than 100.

This shows that daily compounding is very close in effect to continuous compounding. It would take almost 150 years to make a difference of 0.1% in value.

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3 years ago
How can 15/6 mixed number in simplest form
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2 1/2 because you divide the 15 by 6 and 2 R.3   3 is half of 6 so you make it a half leaving you with 2.5 or fraction form:2 1/2
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Adam currently runs about 2 miles per week and he wants to increase his weekly mileage by 30%. How many miles will Adam run per
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2(1.3)=number of miles per week
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