Question

Please somebody can help me with # 3 and # 6. Thanks.

Answer 1

3 is order of operations
some people learn PEDMAS
to remember: parens, exponents, divide/multiply, add/subtract

Answer 2

Thanks phi

Answer 3

what do you get for #3 ?

Answer 4

for 6,
they want "pounds per tart"
or
\[ \frac{pounds}{tart} \]
which is a clue as to how to solve
simplify
\[ \frac{475 \ pounds}{1000 \ tarts} \]

notice that to divide by 1000, you can do it the "fast way" and move the decimal point of the top number 3 places to the left.