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Gnoma [55]
3 years ago
8

Interest earned to the nearest cent for each principal interest rate and time 640$ ,3%,2 years

Mathematics
1 answer:
Mazyrski [523]3 years ago
6 0
If it's a simple interest = $38.4
If it's a compound interest = $678.98

Solutions
Simple interest, I = principal x rate x time
Principal = $640
Time = 2 years
Rate = 3% = 3/100 = 0.03, then substitute respectively.

Compound interest, A = P (1 + r)^t
Substitute respectively. Remember, always divide your rate in percent by 100.
Don't forget to read the question and approximate correctly.
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Write the algebraic expression for the difference between the squares of two numbers.
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The algebraic expression for the difference between the squares of the two numbers, supposing the two numbers to be a and b, is

a² - b² = (a + b)(a - b).

An algebraic expression is a combination of terms, where the terms are separated using mathematical operators like plus (+), minus (-), multiply (*), and divide (/).

The terms are combinations of numerals and variables.

Variables are represented alphanumerically, which can hold any value as per the expression they are used in.

In the question, we are asked to write the algebraic expression for the difference between the squares of two numbers.

We assume the two numbers to be a and b respectively.

Thus, we are asked to write an expression for the difference between the square of a and square of b, that is, we are asked to write an expression for a² - b².

We know that a² - b² is an identity, which can be shown as (a + b)(a - b).

Thus, the algebraic expression for the difference between the squares of the two numbers, supposing the two numbers to be a and b, is a² - b² = (a + b)(a - b).

Learn more about algebraic expressions at

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aivan3 [116]

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this year, the winner of the new york marathon ran the 8 kilometer event in 24 minutes. what is the runners unit rate
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Read 2 more answers
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