A charity organization has a large list of donor records, sorted alphabetically by name. Each record contains the amount of money donated in the current year. Which of the following represents an algorithm that will locate the top seven donors for the current year?
a. Seven passes through the outer loop of an insertion sort
b. Seven passes through the outer loop of a selection sort
c. Seven recursive calls to mergesort
d. Seven passes through the loop of a binary search
e. Accessing the last seven entries in the list

6/20

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

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734