Felipe surveyed students at his school. He found that 78 students own a cell phone and 57 of those students own an MP3 player.
There are 13 students that do not own a cell phone, but own an MP3 player.
Nine students do not own either device.

A two way table for the above information is given below:


Find the value of a, b, c, d and e.

a =

b =

c =

d =

e =

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!

x = 12

y = 1

for the points!