Answer:
150.
Step-by-step explanation:
This is arithmetic sequence with common difference d = 2 and first term
a = -4.
nth term = a + d(n - 1)
78th term = -4 + 2(78-1)
= -4 + 77*2
= 150 (answer).
Answer:
The area of the shaded region is ![37.70\ cm^{2}](https://tex.z-dn.net/?f=37.70%5C%20cm%5E%7B2%7D)
Step-by-step explanation:
we know that
The area of the shaded region is equal to the area of the circle color blue minus the area of the circle color green
The area of the circle is equal to
![A=\pi r^{2}](https://tex.z-dn.net/?f=A%3D%5Cpi%20r%5E%7B2%7D)
so
![A=\pi (4^{2})-\pi (2^{2})=12\pi\ cm^{2}](https://tex.z-dn.net/?f=A%3D%5Cpi%20%284%5E%7B2%7D%29-%5Cpi%20%282%5E%7B2%7D%29%3D12%5Cpi%5C%20cm%5E%7B2%7D)
assume
![\pi =3.14156](https://tex.z-dn.net/?f=%5Cpi%20%3D3.14156)
![A=12(3.14156)=37.70\ cm^{2}](https://tex.z-dn.net/?f=A%3D12%283.14156%29%3D37.70%5C%20cm%5E%7B2%7D)
Answer:
C. 468mm^2
Step-by-step explanation:
Using the formula for finding the surface area of cuboids [ S = 2(lw + lh + wh) ]
we have found the answer 468mm^2.
(Sorry for taking so long for a short explanation!
l = length , w = width , h = height . Just do the calculation with the algebra I have set out for you)
[Hey, if the answer is wrong in this question, feel free to message me!]