Which expression is equivalent to (r^-7)^6

a. r^42

b. 1/r^42

c. -7r^6

d. 1/r

(r^-7)^6 = r^-1 = 1/r

Therefore the answer is D. 1/r

Let me know if you have any questions.

B. 1/r^42

Step-by-step explanation:

(r^-7)^6= r^-7*6= r^-42.

As a positive exponent: 1/r^42

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540