peachturtle776

Please answer a and c 

Calculate the energy of a photon having a wavelength in the following ranges.

Using a scale of 1cm to 1 unit on both the x – and y – axes, graph the given function.

 f (x) = {
𝑥 + 3, if − 2 ≤ 𝑥 < 1
5, if 𝑥 = 1
−𝑥 + 2, if 𝑥 > 1
 
 (ii) Using the function, evaluate: f (-2) − f (1) + f (2). 

what is 5 x 5?

Solve.