Which estimation technique will yield a solution that is closest to the actual product of (–21.06)(–30.45)?

4. a spring scale is constructed so that each 0.10-n increment is separated by 0.50 cm. what spring constant is necessary for the scale to be accurate? -1.0n/cm -0.10n/cm -9.8 n/cm -0.20n/cm

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?