Answer:
Option (C)
Step-by-step explanation:
Surface area of a right prism = 2(Area of the triangular base) + Ph
Here, P = Perimeter of the base
h = Height of the prism
Area of the triangular base =
= 
= 30 cm²
Height of the prism = 15 cm
Perimeter of the base = (5 + 12 + 13)
= 30 cm
Surface area of the right prism = 2(30) + 30(15)
= 60 + 450
= 510 cm²
Therefore, Option (C) will be the correct option.
42. Because you divide into 6 and 7. 6 is divided into 3 and 2. So, 2 times 3 times 7.
Answer:

Step-by-step explanation:
Given, value of y = 4
To find : Value of x

plug the value of y

Multiply the numbers : 4 and 4

Move 16 to right hand side and change it's sign

Add the numbers : 65 and 16

Divide both sides by 3

Calculate

Hope I helped!
Best regards! :D
Answer:
there aint no pic, mate
Step-by-step explanation: