Let’s learn how to use the quadratic formula. Using the quadratic formula is one of the methods used in solving quadratic equations, especially when the equation cannot be solved by factoring. The quadratic formula solves any quadratic equation in the standard form: ax2+bx+c = 0, where a ≠0. So, make sure the equation you’re working on is in the …
Area of a Rectangle: Formula & Examples
Let’s learn how to determine the area of a rectangle. A rectangle is a four-sided shape with equal and parallel opposite sides. Remember that area refers to the total amount of space enclosed in a shape. The area is expressed in square units such as square meter (m2), square in (in2), or square kilometer (km2) To find the area of …
Surface Area of a Cylinder: Formula & Examples
Let’s learn how to determine the surface area of a cylinder. What is a Cylinder? A cylinder is a tube-shaped object with two same-sized circular bases, parallel straight sides, and a circular or oval cross-section. Its height is the distance between the two bases, while the radius is the distance from the center of a base to any point on the …
Volume of a Cylinder: Formula & Examples
Let’s learn how to determine the volume of a cylinder. What is a Cylinder? A cylinder is a tube-shaped object with two same-sized circular bases, parallel straight sides, and a circular or oval cross-section. Its height is the distance between the two bases, while the radius is the distance from the center of a base to any point on the same …
Volume of a Sphere: Formula & Examples
Let’s learn how to determine the volume of a sphere. What is a Sphere? A sphere is a perfectly symmetrical three-dimensional shape whose all surface points are equidistant from the center. The distance from the center to any point on the surface is called the radius. Twice the radius is the diameter or the line segment that passes through the center. …
Mean Median Mode: Measures for Data Sets
Let’s learn how to determine the mean, median, and mode. Once in a while, you probably stare at a group of numbers – grocery prices, scores in a test, monthly sales, ages of your family members – and think how to make sense of them. These groups of numbers are also called data sets. A data set is a collection …
Perimeter of a Rectangle: Formula & Examples
Let’s learn how to determine the perimeter of a rectangle. What is a Rectangle? A rectangle is a four-sided flat shape with two pairs of parallel and congruent lines that form a right angle on each of the four sides. A rectangle is also called a parallelogram – a quadrilateral whose opposite sides are equal and parallel. By this definition, …
Area of a Circle: Formula & Examples
Let’s learn how to determine the area of a circle. A circle is a shape containing a set of points that are equidistant from a given point. The point is called the center, and the distance from the center to any point in the circle is called the radius. Twice the length of the radius is called the diameter – …
What is the Best Calculator for the SAT or ACT?
By Blaise P. Episode 10, Season 34 of NBC’s hit show Saturday Night Live was, without a doubt, the most glorious moment in television history. At least, it was for me. John Malkovich — known for his roles in Bird Box (a recent Netflix horror hit) and Warm Bodies (the only dystopian rom-com I’ve ever seen) — hosted, with rapper …
How ACT Math is Getting More Difficult
Standardized tests like the SAT and ACT continue to evolve, trying to capture how well prepared today’s students are for the academic challenges of 21st century higher education. While some of these changes are widely publicized, some are quietly adopted with little fanfare. Anyone familiar with the ACT math section has likely noticed one of these silent shifts in the …