160 is the first because 1 inches 20 but it says 2 inches so at 40+40+40+40
and the 2nd part is yes he is correct because he converted the inches into feet so i think he is also correct
Answer:
4.24
Step-by-step explanation:
Total price = price of the book + 5% of the price of the book
T = total price P = price of the book G = GST
T = P + G
and
G = 5% of P = 0.05P
therefore
T = P + 5%P = 1P + 0,05P = 1.05P
P = T/1.05 = 89/1.05 ≅ 84.76 (it is 84.7619047619)
G = 89 - 84.76 = 4.24
Answer: the width is 66
Step-by-step explanation: see if 87m is the width then you add it twice it equals 174 then you subtract it from 306m which equals 132 but since theres two sides you divide it to get 66 Hope this help happy Easter!! c:
Answer: r = C/(2pi)
This is the same as writing 
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Explanation:
pi is some number (approximately 3.14) which means 2pi is also some number (roughly 6.28)
Saying c = 2pi*r means we have 2pi times r, and the result is the circumference c. To isolate r, we'll undo the multiplication. We'll undo it by dividing both sides by 2pi like so
C = 2pi*r
C/(2pi) = r
r = C/(2pi)
in which we can write it like 
So whatever C is, we divide it over 2pi (aka roughly 6.28) to get the radius.
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Extra Info (Optional Section):
As an example, let's say the circumference of the circle is 628 feet. This means the distance around the circle is 628 feet. So C = 628 would lead to...
r = C/(2pi)
r = C/(6.28)
r = 628/(6.28)
r = 100
So the radius would be roughly 100 feet.