12. Does the table show a proportional relationship? If so, what is the value of y when x is 9?
x
2
10
3
15
4
20
5
25
y
B
yes, 45
A yes. 90
yes. 40
Dino

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680

y=1/4x-4

step-by-step explanation:

56

step-by-step explanation:

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)