Jonathan can type a 20 page document in 40 minutes, susan can type it in 30 minutes, and jack can type it in 24 minutes. working together, how much time will it take them to type the same document?

Answer:

It takes 10 minutes for Jonathan, Susan and jack to type the document

Step-by-step explanation:

Given:

Time Taken by Jonathan to type 20 page document=40 minutes

Time Taken by Susan to type 20 page document=30 minutes

Time Taken by Jack to type 20 page document= 24 minutes

To Find:

Total time taken if all three type together=?

Solution:

Number of pages Jonathan can type in 1 min = = pages

Similarly, Number of pages Susan can type in 1 mi =  = pages

Similarly, Number of pages Jack can type in 1 mi =  =  pages

So, if they all work together then

no. Of pages they can type in 1 min = + + =2 pages

no. Of pages they can type in 1 min =0.5+0.6+0.8

no. Of pages they can type in 1 min = 2 pages

So, they can type 20 pages in = =10 min

i would say the third one.

step-by-step explanation: liner would mean in a line and the only one that doesn't look like it's even thinking about forming a line would be the third one

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.