Answer:
Option B
Explanation:
Speed of a wave is denoted by:
v=fλ
where f is the frequency which is unchanged 15Hz and λ is the new wavelength which is 28m
v=fλ

Answer: B. store electric charges.
Explanation: I JUST TOOK THE PF EXAM AND I GOT IT CORRECT!!!!
You would get 13.7
mi/51mm=3.5mm/13mm
by solving it you will B13.7mm
I am pretty sure it's solids
As they grow up, they will separate with their mother and tend to their own self. They will learn to catch fish and stay alert for predators. Eventually, they will find their own mate and produce their own offspring.