What expression is equivalent to (st)(6)?

A. S(t(6))

B. S(x) x t(6)

C. S(6) x t(6)

D. 6 x s(x) x t(x)

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

Apatient is to take 60 mg of an antibiotic on day 1, take 45mg on days 2 and 3, take 30mg on days 4 and 5 and take 15 mg on days 6 and 7. how many total mg will the patient take?

This is so hard and it’s for a test