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IRINA_888 [86]
2 years ago
8

1. Ralin and Michael each opened a savings account with a deposit of $15,950.

Mathematics
1 answer:
MaRussiya [10]2 years ago
6 0

Answer:

<u>Simple interest formula</u>

  • I = Prt, I- amount of interest, P- principal, r- interest rate, t - time
  • A = P(1 + rt), A - final amount, the rest as above

#1

18 months = 1.5 years

The difference in the amount of interest:

  • $15950*1.5*(5.5-3)/100 = $598.13

#2

  • $3000*(1 + 4*12/100) = $4440

#3

  • $7050*8*(6 - 5.5)/100 = $282

#4

  • $950*(1 + 12*3.65/100) = $1366.10

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The correct option is (b).

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The mean and standard deviation of the active minutes of students is:

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