Can someone please help me with this physics question?

Question

I have most parts of the question answered already. (i only need help with b and c). Thanks

The motion of a body is described by the equation 3.50 sin (0.100ðt)where t is in s and y is in m.

(a) Find the amplitude
3.50 m

(b) Find the period

(c) Find the frequency.

(d) Find the displacement at t = 3.50 s.
3.11 m

(e) Find the displacement at t = 23.5 s.
3.11 m

Answer 1

I don't see a y in your "equation".

What is the ð symbol supposed to represent? (after the 0.100)

Whatever number is on front of t in parentheses is 2 pi f.

f is the frequency

The period is 1/f