11. There are a total of 30 puzzle pieces. Three out of 5 are red, the remaining are black. How
many puzzle pieces are black?

2

Step-by-step explanation:

5-3=2

30-5=15

12 black

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Step-by-step explanation:

3/5 = red

3/5 of 30 = 18

30-18 = 12 black

b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.