An object moves in simple harmonic motion with period 8 seconds and amplitude 5 cm. At time t = 0 seconds, its displacement d from rest is -5 cm, and initially it moves in a positive direction.
Give the equation modeling the displacement d as a function of time t.

5050

hope this !

false

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

answer

you start with $5 and save $10 a week until you have at least $45wer

step-by-step explanation: