The diameter of a coaster is 7 centimeters. What is the total area of five coasters? Round to the nearest hundredth if necessary.

The total areas of five coasters are 192 square centimeters, if the diameter of a coaster is 7 centimeter.

Step-by-step explanation:

The given is,

                   The diameter of a coaster is 7 centimeters

Step:1

                   Formula to calculate the area of circle,

                                ........................(1)

                 Where, r - Radius of circle

                 From given,

                           Diameter, d = 7 centimeters

                   Formula for radius,

                                                     = 3.5

                                     Radius, r = 3.5 centimeters

                     Equation (1) becomes,

                                                                   (∵ )

                                                 A = 38.465 square centimeters  

Step:2

                Area of five coasters,

                                                 = No. of coasters × Area of a coaster

                                                 = (38.465 × 3.14 )

                                                 = 192.325

                                                ≅ 192 square centimeters

Result:

          The total areas of five coasters are 192 square centimeters, if the diameter of a coaster is 7 centimeter.

answer: the correct one is a

step-by-step explanation:

step-by-step explanation:

f(x)=2x^2 -1 

translation is a function transformation that transform the function in a way of translating. by translating the function its graph is moved  up an down. moving the function f(x) 2 units to the left will be the new function g(x) with the equation: g(x)=f(x+2)=2(x+2)^2 -1