Divide 3 by for to get 0.75 but that is a fraction
Answer:
96%
Step-by-step explanation:
too easy for me
All of the telephones * all of the telephones minus one (because one is in use)
85 * 84 = 7140 connections
<span><span>∑<span>i=2</span><span>i=10</span></span>(4+2n)=</span><span>
You can do it by hand, w/o much work .
plug in n=2 into (4+2n)
then plug in n=3 into (4+2n)
then plug in n=4 into (4+2n)
etc until you get to n=10. Add them all up.
</span><span>add 8 + 10 + 12 + 14 + 16 + 18 + 20 + 22 + 24
</span><span>144 jumps!</span>
