Astronomers have observed that sunspots vary sinusoidally. The
variation is from a minimum of about
10 sunspots per year to a maximum
of about 120 per year. A cycle lasts
about 11 years. If a minimum
occurred in 1964, which function
could model the number of sunspots,
S, as a function of the year, t?

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15