how do you solve equations for given variables and use formulas to solve real world problems

1. At a point 50 m from the foot of a building, the angle of elevation of the top of the building is 70 o 36 ' . Find the height of the building. 2. The shadow of a vertical lower on level ground increased by 10 m when the altitude of the sun changed from 45 o to 30 o . Using..

BC = 50 x tan 70 o 36 ' = 50 x 2.840 = 142.0 m BC = 142.0 m The shadow of a vertical lower on level ground increased by 10 m when the altitude of the sun changed from 45 o to 30 o . Using the given figure, find the height of the tower, correct to one place of decima..

Results and observations of scientific experiments should be properly recorded under headed columns and numbered rows. The headings must include the units in which each quantity is measured. Graphs are very helpful in comparing measurements. The general rule in plotting the graph of a givenh..

An equation of one variable and of first order (i.e., its highest power is one) is called a Linear equation. Such an equation has only one solution. A solution is also called the 'root' of the given equation.An equation of one ..

Summary Linear Equations in One Variable - A solution of a linear equation is the value of the variable which makes LHS = RHS. It is also called the "root" of the equation. A solution of a linear equation is the value of the variable ..

The graphical method of solving an LPP is possible only if there are two decision variables (say x and y). This method is not suitable if there are three or more decision variables. In this case, there is a powerful method called 'simplex method'. The wide usage of lin..

A homogeneous differential equation is solved by using y = vx and transforming the given differential equation to a variables separable form in x and v. To solve homogeneous differential equation we use t..

Introduction - Let us began this chapter with the following statement: Often a physician may want to test how small changes in dosage can affect the body's response to a particular drug. An economist may want to study how investment changes with variation in interest rates. ..

Simply stated, Green chemistry is the use of chemistry for preventing environment pollution in order to protect human health. It may give the impression that it is branch of chemistry involving plants, which is not true. Green chemistry may be defined as the design of new chemical product..