Answer:
A. Chemical to electric energy
Step-by-step explanation:
The cells in the device undergo a chemical process to produce electric energy first
A’B’ and AB are equal in lenght
When we rotate an object it’s length does not chance only it’s position.
(270 degrees it means you rotate 3 times)
Answer:
Option A. 
Step-by-step explanation:
we know that
The volume of the cylinder is equal
where
r is the radius of the base of cylinder
h is the height of the cylinder
we have
substitute
Answer:
14
Step-by-step explanation:
Order of operations rules require that we do any work inside parentheses first. Thus,
–(31 + 2) + 72 – (–5)^2
becomes:
-33 + 72 - 25, or
14
Important: Please use " ^ " to denote exponentiation; (-5)2 is incorrect, whereas (-5)^2 or (-5)² is correct.
i believe your answers would be
1/2c+7 and 2H-9
