Rachel charges $7 to rake leaves in her neighborhood. Last week, she raked leaves in 3 yards. She put 2/3 of her savings account. How much did Rachael save?

14

Step-by-step explanation:

7*3=21

2/3 of 21 is 14 so she saved 14 dollars

$20.33

Step-by-step explanation:

7x3=21

21- (2/3)

= 20.3333333

i can

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