Which expression is equivalent to (3^2)^-2

–81
–12
1\81
1\12

Option C is correct

Step-by-step explanation:

Given the expression:

We can write as:

then;

Using the exponent rule:

then;

⇒

Therefore, the expression which is equivalent to is, .

step-by-step explanation:

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft