Mary shipped two packages to her friend the first package weighed 2 5/6 grams and second package weighed 1/2gram the price to ship 3 dollar per grem how much did mary pay to ship the two packages

Step-by-step explanation:

First you must get a common denominator for both fractions. In this situation its 6. 2 5/6 + 3/6 = 3 2/6. if she pays 3 dollars per gram she pays 9 dollars.

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