The length of the accordion a(t)a(t)a, left parenthesis, t, right parenthesis (in \text{cm}cmc, m) after she starts playing as a function of time ttt (in seconds) can be modeled by a sinusoidal expression of the form a\cdot\cos(b\cdot t)+da⋅cos(b⋅t)+da, dot, cosine, left parenthesis, b, dot, t, right parenthesis, plus, d. at t=0t=0t, equals, 0, when she starts playing, the accordion is 15\text{ cm}15 cm15, space, c, m long, which is the shortest it gets. 1.51.51, point, 5 seconds later the accordion is at its average length of 21\text{ cm}21 cm21, space, c, m.

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.

49%

step-by-step explanation:

when you realize that you dont know just realize i just took a test and im so smart

answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation:

answer: answer is b.

[m < b = 120º]

step-by-step explanation: