Samantha was comparing the price of pineapple juice at two stores. The equation y = 0.47x represents what Samantha would pay in dollars and cents, y, bottles of pineapple juice at store B. Samantha can buy 8 bottles of pineapple juice at Store A for a total cost of $ 14.32 .

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step-by-step explanation:

i believe that the answer is

b. y-1=-2(x-4)

hope this !

m∠a is 90°

m∠b is 40°

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places