Distribute the first set of parenthesis
<span><span>15<span>r<span><span>2</span><span></span></span></span>−20r+6r−8</span><span>
Combine like terms
</span><span><span>15<span>r<span><span>2</span><span></span></span></span>+(−20r+6r)−8</span><span>
Simplify your answer
</span><span>15<span>r<span><span>2</span><span></span></span></span>−14r−8
*Answer is </span>15r^2−14r−8*<span><span>
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The forth option is the different value
Answer:
Step-by-step explanation:
= Half life of carbon = 5730 years
= Decay rate =
Duration of time passed is given by
The scroll is old.
There are many ways you can say it,
one of them would be:
8 added to 5 multiplied by x