ANSWER
B. 700 units^2
EXPLANATION
The surface area of the pyramid is the area of the four triangular faces plus the area of the square base.
The area of the four triangular faces is
![= 4 \times \frac{1}{2} \times bh](https://tex.z-dn.net/?f=%20%3D%204%20%5Ctimes%20%20%5Cfrac%7B1%7D%7B2%7D%20%20%5Ctimes%20bh)
We substitute b=14 and h=18.
![= \frac{1}{2} \times 14 \times 18 \times 4](https://tex.z-dn.net/?f=%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20%20%5Ctimes%2014%20%5Ctimes%2018%20%5Ctimes%204)
![=504 {units}^{2}](https://tex.z-dn.net/?f=%20%3D504%20%7Bunits%7D%5E%7B2%7D%20)
The area of the square base
![= {14}^{2} = 196 {units}^{2}](https://tex.z-dn.net/?f=%20%3D%20%20%7B14%7D%5E%7B2%7D%20%20%3D%20196%20%7Bunits%7D%5E%7B2%7D%20)
The surface area of the pyramid is
![= 196 + 504 = 700 {units}^{2}](https://tex.z-dn.net/?f=%20%3D%20196%20%2B%20504%20%3D%20700%20%7Bunits%7D%5E%7B2%7D%20)
3 weeks · 7 days/week = 21 days
![\frac{2394}{21}](https://tex.z-dn.net/?f=%20%5Cfrac%7B2394%7D%7B21%7D%20)
= 114 pounds each day
Answer:
Total # of marbles: 10
# of red marbles: 7
Probability of choosing a red marble out of 10 marbles: 7/10
Then in the second round, you replace that marble so you still have a total of 10 marbles and 7 of them will still be red: 7/10
Multiply...
7/10 x 7/10 = 49/100
PROBABILITY: 49/100 (or 49%)
Hoped I helped
Answer:
x = 18 cm
Step-by-step explanation:
(4x)^2 = 3(4x)(x+6)
16x^2=3(4x)(x+6)
divide both sides by 4x
4x = 3(x+6)
4x=3x+18
x = 18
We can use substitution to solve this equation in here y=6 and x=0 .
Hope this help you !