The cost of an item is $75. What will the total cost be with 9% tax?
2 answers:
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Rationalizing the denominator involves exploiting the well-known difference of squares formula,
We have
so that
Rewrite 16 and 32 as powers of 2, then simplify:
So we have <em>A</em> = 8, <em>B</em> = 2, <em>C</em> = 4, and <em>D</em> = 7, and thus <em>A</em> + <em>B</em> + <em>C</em> + <em>D</em> = 21.
Answer:
D. 420
The area of a triangle is
half of(base× height)
10×16= 160
160÷2=80
That is the surface area of ONE triangle.
multiply 80 by 4 to get 320
then find the surface area of the square by doing length×width to get 100
Finally add them together
320+100=420