Coffee cafe makes 90 pounds of coffee that costs $6 per pound. the types of coffee used to make this mixture cost $7 per pound and $4 per pound. how many pounds of $7-per-pound coffee should be used in this mixture?

the answer is 60 lbs of $7/lb coffee is needed in this mixture.

Step-by-step explanation:

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.