Question

A power company calculates a person's monthly bill from the number of

Answer 1

Answer: (b)

Step-by-step explanation:

Given

Function for bill calculation is

$\Rightarrow b(x)=\left \{ {{0.15x\quad \quad \quad \, \ \ \ \ x200}} \right.$

The consumption is 700 kWh i.e. more than 200

Therefore, bill is given by the second function i.e. $0.10(x-200)+30$

Substitute 700 for x to get the bill

$\Rightarrow 0.1(700-200)+30\\\Rightarrow 50+30=\ 80$

Hence, option (b) is correct.