Fernando has been saving money to buy an e-book reader. A store has just marked down the price of its readers by 40%. Each reader comes in with a mail-in rebate for $25. The original price of the e-book reader was $150. How much will Fernando save because of the 40% markdown? Show your work.

Fernado saves $90.

Step-by-step explanation:

40% of $150 ( original price ) = $60

$150 - $60 ( original price - discounted price ) = $90 ( savings )

The question asks about the 40% markdown only, so I'd assume you wouldn't reduce it by $25.

But if you did Fernando would save $115 :

40% of $150 ( original price ) = $60

$60 - $25 ( mail-in rebate ) = $35

$150 - $35 ( original price - discounted price ) = $115 ( savings )

answer: plz put a pic in so i can answer it

step-by-step explanation:

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