Or does anyone know how to solve this one ?
1 answer:
The small & large triangle are similar the we can write the following proportion/ratio:
8/(8+x) = 12/(12+18) ==> 12(8+x) =8(12+18) ==> 96+12x=240
12x =240-96 ==> 12x = 144 and x=12
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Is there a question or is this it ?
it basically answers itself because 2 times 3 is 6
49.99 = 0.6x, where x = original coat of jacket.
To solve for x divide both sides by 0.6, and you get x = $83.32 (rounded)
To find it directly
A = 2 pi r h
A is proportional to rh
factor 2
A is multiplied by 2 * 2 = 4
factor 3
3 * 3 =9
factor 5
5 * 5 = 25
factor 10
10 * 10 = 100
(b) the increase in A by factor x is x^2
c(20)^2 = 400
See the image below, hope it helps!
Im not good in math and this is my first question, my best guess is D
I will investigate tommorow this problem a little bit more... <3
