Question #312704

1] A newborn child receives a $20000 gift towards her tertiary education from her grandparents who insisted the gift should be put in investment for 18 years by the baby’s parents. The highest rate offered was 7%. Parents of the baby opted for the investment to be compounded quarterly.


i. What is the compound interest on the investment


ii. How much is the investment worth.



1
Expert's answer
2022-03-21T12:18:13-0400

1.The compound interest on the investment

Compound interest = =P[(1+i)n1]=P[(1+i)^n-1]

where the principal amount (P) = 20000

the nominal interest rate (i) = 0.074​ \frac{0.07}{4}

number of compounding periods (n) =184=72=18*4=72

Compound interest = 20000[(1+0.074)20000[(1+ ​ \frac{0.07}{4})72 -1]

=200002.487209897=20000*2.487209897

=49744.19794= 49744.19794

The compound interest on the investment is approximately $49744.20

2.The investment worth

The investment worth (A) = P + I

where I is the compound interest

A=20000+49744.20= 20000+49744.20

=69744.20=69744.20

The investment is worth approximately $69744.20


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