ANSWER

EXPLANATION
We want to write

as a single logarithm.
Use the power rule to rewrite the middle term:


Use the product rule to obtain:



Apply the quotient rule:


Hello there,
If she has 10 books and she can arrange it 3 ways on her bookshelf, you just multiply 10 and 3
10 x 3= 30
Susan can arrange 10 books into 3 slots 30 ways.
Hope this helps!
If they are supplements the angles add up to 180
So to find this one
180 - 37.6 = 142.4