There are 4 cities named A-D whos' physical locations happen to be in a line as shown below. The car starts in city C drives to city A then drives to city B. If the distance between cities is d1-d3 (as seen below) then what is the algebraic expression for the magnitude of the displacement this car traveled.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

the answer would be c

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).