One number is 4 more than another. Their product is −4.

2 and -2

Step-by-step explanation:

Lets x be one number and u other number:

U=4+x ( u is 4 more than x)

X*u=-4 (their product is -4)

x*(x+4)=-4

X^2+4x+4=0

(X+2)^2=0

x=-2

U=4+(-2)=4-2=2

b) the dogs need to shift their focus to human scent.

4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4