Jeff has to talk to 40 people each day on average only 8 out of the first 10 people answer the phone how many people Jeff will need to call before talking to 40 people

Jeff needs to call 50 people so as to talk to 40 people.

Step-by-step explanation:

Given,

Number of people Jeff needs to talk = 40

8 out of 10 answer the phone.

We need to find the number of phone calls Jeff needs to do so as to talk to 40 people.

Solution:

First we will find the percent of people who answer the call.

Now Given 8 out of 10 people attend the calls.

So we can say that;

percent of people who answer the call =

Now let us assume Total number of people Jeff need to call be 'x'.

So we can say that;

percent of people who answer the call multiplied by Total number of people Jeff need to call divided by 100 is equal to Number of people Jeff needs to talk.

framing in equation form we get;

Dividing both side by 0.8 we get;

Hence Jeff needs to call 50 people so as to talk to 40 people.

d is correct

step-by-step explanation:

the transverse axis of a hyperbola is the line that contains the two vertices and the two focuses.

in this example (hyperbola of equation x^2/2 - y^2/4 = 1), the transverse axis is the  x-axis  . 

step-by-step explanation: