Verna shipped three packages to chicago. if the packages weighed 12 1/2, 35 1/4, and 41 7/20 pounds, what was the total weight? a. 89 1/10 pounds b. 87 7/10 pounds c. 84 13/20 pounds d. 89 19/20 pounds

A

Step-by-step explanation:

1st package weighs pounds;

2nd package weighs pounds;

3rd package weighs pounds;

First, add whole numbers:

Now add fractions:

So, the total weight is

answer: 12   they all have at least 28 days

step-by-step explanation: haha

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