We can write any number n in the form
, since
and
are inverse functions, so that

The bases are the same on both sides, so the exponents must be equal.

Solve for x :


Answer:
d = 3.4
Step-by-step explanation:
d × 5 = 17
Divide by 5 from both sides,

d = 3.4
Answer:
13
Step-by-step explanation:
Answer:
He needs 37.8 meters altogether.
Step-by-step explanation:
Because each plank is 2.7 meters, we can just multiply 14 by 2.7 to get 37.8 meters.