Yes it is. It is further from zero.
Undefined: You cannot divide by zero
-21 is greater. With respect to zero, -22 is greater.
Here's how to figure these out. First, which is the biggest number (ignore the sign for now). Got it? Okay, now if it has a negative sign in front, that's your smallest number. In the list above, the biggest number does indeed have a negative sign, so it's your smallest. If it doesn't, then it's your biggest number. A negative sign turns your biggest into your smallest. The smallest number is either the positive number that is closest to zero in a list, or if the list has negative numbers, then it is the biggest negative number (that would make it the farthest away from zero).
3
-8 × (number + 21) = 96 → number + 21 = 96 ÷ -8 → number = 96 ÷ -8 - 21 = -12 - 21 = -33
It is a negative whole number which is the same as an integer
Yes. The product of an odd number (21, in this case) of negative factors will be negative; if the number of negative factors is even, the product will be positive.
The Sun has zero declination at the two equinoxes on March 21 and September 21 (approximately). At the autumn equinox in September it crosses the plane of the Earth's orbit from north to south, so its declination goes from positive to negative.
There is no whole number that has that value. The nearest whole number is zero.
The square roots of 21 are 4.5826 (rounded) and the negative of the same number.
The absolute value of 21 is 21.