How would you simplify the expression 656.65 using significant figures?

If x=2 what’s 3x+4? What is the area of a circle with a radius of 4 millimeters? Is throughout a compound noun? What is equivalent to 5455 cm3? How did you get the answer 52 for 117 divded by 2.25 don't see how? What does NC mean in eletrical terms? What are the firs two common multiples for 4 and 5? Where would you find a radius? What is another word for excessive questions? Why is big ones always mean to their younger ones? What is 1 microliter divided by 10000? Will a 10 inch miter saw cut through a 4 x 4? How are triangle and trapezoid same? How can you whether bleeding is just mensuration? If a cube intersects a plane what possible figures can be formed? What is the LCM of 99 and 100? What is andriot? What is to replace a variable with a number or anotherexpression in an expression? Square root of x to the 5th? 13 in Roman Numerals?