The number below represents the size of a transistor on a computer chip in 2010. Rewrite this number in standard notation. 2.2x10^−6cm

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.

what's the question here?