Which function has exactly one zero? f(x)=x2−9

f(x)=x2+4x+4

f(x)=x2−4(x+3)

f(x)=5(x+6)(x−6)

In δabc, if the length of side b is 3 centimeters and the measures of ∠b and ∠c are 45° and 60°, respectively, what is the length of side c to two decimal places?

Ineed ! the person who answers and shows their work on they got the answer first will be marked the !

Gail is making costumes for a school play. each rabbit costume needs one and one half yards of white fur fabric, a yard of blue striped fabric, and a quarter of a yard of pink felt for the ears. g? ail needs to make eight rabbit man yards will she need, for the white fur fabric, blue striped fabric, and pink felt?