Suatu grup musik merilis album, penjualan per minggu (dalam ribuan) dinyatakan dengan model s(t) = -2 |t - 22| + 44, t waktu (dalam minggu).
a. gambar grafik fungsi penjualan s(t)
b. hitung total penjualan selama 44 minggu pertama
c. dinyatakan almu emas jika penjualan lebih dari 500.000 copy. hitung t agar dinyatakan album emas

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