Given that 1 inch = 2.54 cm, how many centimeters are there in 9 feet? Answers may be written using decimal form and should be rounded to the nearest hundredth when necessary.

274.32 cm

Step-by-step explanation:

1 foot = 12 inches

9 feet = 108 inches

1 inch = 2.54

9 feet = 108(2.54) cm = 274.32 cm

step-by-step explanation:

where is the question is there is a formula or is there not one

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81