Well, start from 100% and work backwards.
It takes 5600 years to get to 50%
Another 5600 years to get to 25%
And a bit under another 5600 to get to 15% (another 5600 years would get it down to 12.5%)
Add the first two 550s to get 1120, and add about 5,000 and see which answer is closest.
In this case, D is closest at 15!w29
There are more exact ways of solving, but for a multiple choice this is faster and efficient nonetheless
Answer:
The seacont one will be your answer hope it helps
Step-by-step explanation:
12 and the others don’t make the team
<em><u>The equation used to find the cost of student ticket is:</u></em>

<em><u>Solution:</u></em>
Given that,
A teacher brings $50 to pay for museum admission
She buys an adult ticket for $3.50 and 13 student tickets
Cost of adult ticket = $ 3.50
Let "x" be the cost of each student ticket
Three students arrive late so she buys 3 more student tickets
She has $18.50 left
<em><u>The equation used to find the cost of student ticket is:</u></em>
Cost of adult ticket + 13 student tickets x cost of each student ticket + 3 student ticket x cost of each student ticket = 50 - 18.50

Thus the above equation is used