Why is 12 * 10-8 is not a correct representation of scientific notation? 1) the number must be less than 10. 2) the exponent is negative. 3) the numbers cannot be multiplied. 4)there is no decimal present.

Which expression is equivalent to sq-80

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|