The second option! Hope this helps!
Answer:
![173.21cm^2](https://tex.z-dn.net/?f=173.21cm%5E2)
Step-by-step explanation:
![A=\frac{\sqrt{3} }{4} a^2\\P=3a\\](https://tex.z-dn.net/?f=A%3D%5Cfrac%7B%5Csqrt%7B3%7D%20%7D%7B4%7D%20a%5E2%5C%5CP%3D3a%5C%5C)
Solve for A
![A=\sqrt{3} \frac{P^2}{36} \\=\sqrt{3} *\frac{60^2}{36} \\=173.21cm^2](https://tex.z-dn.net/?f=A%3D%5Csqrt%7B3%7D%20%5Cfrac%7BP%5E2%7D%7B36%7D%20%5C%5C%3D%5Csqrt%7B3%7D%20%2A%5Cfrac%7B60%5E2%7D%7B36%7D%20%5C%5C%3D173.21cm%5E2)
80 blocks. 16 block fit at the base of the box and then you multiply 16 by the product of 7.5/1.5. 16 times 5 is 80
If x is the first number, x+2 is the next consecutive even integer. The difference (subtraction) of their squares equals 20. Therefore:
(x+2)²-x²=20...expand this:
x²+4x+4-x²=20
x²+4x+4-x²=20
4x+4=20
4x=16
x=4. Therefore the next consecutive even integer is x+2=6.
To check: 6²-4² must equal 20
36-16=20 check!
Answer:
15
Step-by-step explanation:
10% of 12 =1.2
1.2*2= 2.4 (20%)
1.2/2= 0.6 (5%)
2.4+0.6= 3
12+3= $15