When a number is decreased by 3%, the result is 80. What is the original number to the nearest tenth?

A number decreased by 3% would be 97% of the original number.

Divide the new number by the percent of original number:

80/ 0.97 = 82.4742

Rounded to the nearest tenth = 82.5

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