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3 years ago

If the simple interest on $4000 for 9 years is $1800, then what is the interest rate.

Mathematics

2 answers:

pychu [463]3 years ago

8 0

Answer:

Step-by-step explanation:

4000 × 9 × r = 1800

r = 1800/36000

r = 0.05 × 100

marysya [2.9K]3 years ago

5 0

Answer:

9% or 0.09

Step-by-step explanation:

so 1800/4000 is .45 then we do .45/5 which is 0.09 and if u wanna double check do 4000 x 0.09 then that gives us 360 then we do 360 x 5 for 5 years that you've been investing which leaves us with 1800 which is the interest you got.

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The measure of central angle QRS is StartFraction 8 pi Over 9 EndFraction radians. What is the area of the shaded sector? 36Pi u

MArishka [77]

The question is missing the figure. So, it is attached below.

Answer:

Area of the shaded sector is 144π units squared.

Step-by-step explanation:

Given:

Central angle of the sector is, $\theta=\frac{8\pi}{9}\ rad$

Radius of the circle is, $R=18\ units$

We know that, area of a sector of a circle of radius 'R' and central angle $\theta$ is given as:

$A=\frac{1}{2}R^2\theta$

Plug in $\theta=\frac{8\pi}{9},R=18$ . This gives,

$A=\frac{1}{2}\times (18)^2\times \frac{8\pi}{9}\\\\A=(\frac{324\times 4}{9})\pi\\\\A=(36\times 4)\pi\\\\A=144\pi\ units^2$

Therefore, the area of the shaded sector is 144π units squared.

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3 years ago

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marishachu [46]

Step-by-step explanation:

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deff fn [24]

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lbvjy [14]

Answer:

Step-by-step explanation:

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Marina86 [1]

Natural numbers are either used to count one to one objects or represent the position of an object in a sequence. They start from one and go on to infinity.This is why they are sometimes referred to as counting numbers. The only whole number that cannot be classified as a natural number is 0. Counting numbers can further be classified into perfect numbers, composite numbers, co-prime/ relatively prime numbers, prime numbers, even and odd numbers. Rational number - refers to the quotient of two integers with a nonzero denominator.
Irrational number - a number is irrational if it has infinite, nonrecurrent decimal places. The decimal value continues forever without any definitive pattern. Such numbers cannot be expressed in fraction form. The most widely known irrational number is pi; the golden ratio is also a notable irrational number.
Numbers can belong to multiple classification groups.

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3 years ago