A wire is in the form of a circle of radius 42 cm. It is bent into a square. Find the side of the square. ( Take π = 22
7
)

the length of the wire = the perimeter of the circle = 2πx42 = (44x6)cm. the perimeter of the square = the length of the wire = 44x6 cm. Hence the length of the sides of the square = 44x6\4 = 66cm

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.