Answer:
The jetski is 2.28 dB loud when the person is 41 feet away.
Step-by-step explanation:
Loudness (L) ∝ 1 / Distance² (d²)
Introduce a constant 'K'
L = K (1/d²)
L = K/d²
K = Ld²
Find the K from a previously known information: If a person 8 feet from a jetski hears 60 decibels loud
∴ d = 8 ft , L = 60 db
K = 60(8²) = <em>3840</em>
How loud is the jetski when the person is 41 feet away?
Distance is now 41 ft
since: L = K/d²
∴ L = 3840 / 41²
L = 3840 / 1681
L = 2.28 db
Carolyn has more than enough paint to cover that wall because she has a gallon of paint that can be done to get the wall painted.
Answer:
.
Step-by-step explanation:
Note: In the given function it should be (n-1) instead of (n=1).
Consider the given function is
It is the explicit form of an A.P.
For 
,
For 
,
Common difference is
The recursive formula of an A.P. is
Substitute 
in the above formula.
Therefore, required recursive formula is .
12.6n2+7.14n is the right option have a good day :)
Answer:
easily look it up on the internet
