Answer:
60 pounds
Step-by-step explanation:
To find the adult weight, multiply 12 by 5.
Since 12 pounds is 20% of the adult weight, 100% of the adult weight would be 12 times 5.
12(5)
= 60
So, the adult weight of the puppy will be 60 pounds
Setting
, you have
. Then the integral becomes
Now,
in general. But since we want our substitution
to be invertible, we are tacitly assuming that we're working over a restricted domain. In particular, this means
, which implies that
, or equivalently that
. Over this domain,
, so
.
Long story short, this allows us to go from
to
Computing the remaining integral isn't difficult. Expand the numerator with the Pythagorean identity to get
Then integrate term-by-term to get
Now undo the substitution to get the antiderivative back in terms of
.
and using basic trigonometric properties (e.g. Pythagorean theorem) this reduces to
(2n-1) /(n+9)
hope it can help u
Answer: Sally walked 3 minutes faster per mile
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