compund interest, depreciation,expressions,equations, inequalities, right angle trigonometry,polygon Flashcards
(27 cards)
What is the formula for compound interest?
A = P(1 + r/n)^(nt)
In the compound interest formula, what does ‘P’ represent?
The principal amount (the initial amount of money)
True or False: Compound interest is calculated on the initial principal only.
False
What does ‘r’ represent in the compound interest formula?
The annual interest rate (decimal)
In the context of depreciation, what is the straight-line method?
A method where an equal amount is deducted from the value of an asset each year.
Fill in the blank: The formula for calculating depreciation using the straight-line method is _____.
Depreciation Expense = (Cost - Salvage Value) / Useful Life
What is an expression in mathematics?
A combination of numbers, variables, and operators without an equality sign.
True or False: An equation must have an equality sign.
True
What is the difference between an equation and an inequality?
An equation states that two expressions are equal, while an inequality indicates that one expression is greater than or less than another.
Which of the following is an example of an inequality? A) x + 2 = 5 B) x - 3 > 2
B) x - 3 > 2
Define a right angle in trigonometry.
An angle that measures 90 degrees.
What is the Pythagorean theorem?
a² + b² = c², where c is the hypotenuse of a right triangle.
Fill in the blank: The sum of the interior angles of a polygon with n sides is _____.
(n - 2) × 180 degrees
How many sides does a hexagon have?
6 sides
True or False: A triangle is a polygon.
True
What is the area formula for a triangle?
Area = 1/2 × base × height
What does ‘n’ represent in the compound interest formula?
The number of times interest is compounded per year
What is the formula for calculating the future value of an investment using compound interest?
Future Value = Present Value × (1 + r)^t
What is a regular polygon?
A polygon with all sides and angles equal.
What is the formula for the perimeter of a regular polygon?
Perimeter = number of sides × length of one side
True or False: The exterior angle of a polygon is equal to the sum of the interior angles.
False
How do you find the length of the hypotenuse in a right triangle?
Use the Pythagorean theorem: c = √(a² + b²)
What is the sine function in a right triangle?
Sine = opposite side / hypotenuse
What is the cosine function in a right triangle?
Cosine = adjacent side / hypotenuse
