Question

Mr Tan invested $5000 in an endowment fund for 5 years. The fund pays an interest compounded yearly. At the end of 5 years, he received a total of $5800. Find the interest rate.​

Answer 1

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It is given that

Principal = 5000

Consider r% p.a as the rate of interest

(i) We know that

At the end of one year

Interest = Prt/100

Substituting the values

= (5000×r×1)/100

= 50r

Here,

Amount = 5000 + 5r

We can write it as

5000+50r=5600

By further calculation

50r=5600−5000=600

So we get

r=600/50=12

Hence, the rate of interest is 12% p.a.

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$\sf\red{Thank\:you!}$

Answer 2

The value of 6(2b-4) when b=5 is 36.

Step-by-step explanation:

Given expression: 6(2b-4). To find the value of 6(2b-4) at b= 5, we need to substitute the b=5 in the expression, we get….Therefore, the value of 6(2b-4) is 36, when b=5.