What is the value of i^20+1?

everyone on here is saying that it’s 2 ? but my options are:

a. 1
b. -1
c. -i
d. i

You know

Squaring both sides gives

Then raising both sides to any integer power gives

That is, any power of where the power is a multiple of 4 will always be equal to 1.

So

But perhaps you mean to write 20+1 as the exponent, in which case

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

step-by-step explanation: