Sam's Club sells 5 pounds of grapes for $8.98 while Costco sells 4 pounds of grapes for $7.50. Give the unit price (\$/lb) of the better deal.

Sam's Club: $1.80

Step-by-step explanation:

To find the unit price, divide the total cost by the number of pounds.

Sam's Club:

8.98/5 = 1.796 ≈ 1.80

Costco:

7.50/4 = 1.875 ≈ 1.88

As you can see, the unit price of Sam's Club is lower, making it a better deal.

two data sets with the same median will not have the same varaibility

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