In how many years, will an amount double itself, if the simple interest is calculated at the rate of 10% p.a.?
1 answer:
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The area of the triangle is 90 m²
Explanation:
Given that the base of the triangle is 15 m
The altitude of the triangle is 12 m
<u>Area of the triangle:</u>
The area of the triangle can be determined using the formula,
where b is the base and h is the altitude
Thus, we have,
and
Substituting the values in the above formula, we get,
Multiplying the terms, we get,
Dividing, we get,
Therefore, the area of the triangle is 90 m²
If the series is made up of numbers in an arithmetic progression, you have
where
is the first term and 
is the common difference between terms.
Since the last term in the series is
, you have
Solve the system
and you'll find that the first term is
(with 
).
where
Since the last term in the series is
Solve the system
and you'll find that the first term is