Help pls :)(

a= 80

b= .25

Step-by-step explanation:

We know that a has to equal 80 because

We can then just solve for b

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

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify