The circular opening of a vase has an inside diameter of 13.5 cm. -13.5 c

What is the approximate area of this circular opening? (Use a = 3.14.)

Step-by-step explanation:

Given

Shape: Opening of a circular vase

Required

Determine the area

This opening implies a circle; hence the area will be calculated using area of a circle.

Solve for radius (r)

Substitute 6.75 for r in

--- Approximated

3.how is solving radical equations different than solving linear equations?

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.