Answer:
The time (t) it takes to clean an office building is <em><u>directly</u></em> <em><u>related</u></em> to the number of people (p) working.
t is proportional to p

2 two-fifths are in four-fifths.
Hope this helps and have a great day!!!
If you need help just comment on my answer.
Answer: the plus sign
Step-by-step explanation:
<em><u>So</u></em><em><u> </u></em><em><u>th</u></em><em><u>e</u></em><em><u> </u></em><em><u>right</u></em><em><u> </u></em><em><u>answer</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>-</u></em><em><u>2</u></em><em><u>3</u></em><em><u>.</u></em>
<h2>
<em><u>Hope</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em><em><u>will</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>u</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em></h2>
Answer:
reactivity
reactivity
Step-by-step explanation: