Miguel asked sandra to make 90 cookies for his party. sandra needs ¼ cup of sugar to make 15 cookies. she incorrectly calculated the amount of sugar she will need.
write a brief note to sandra describing her mistake and explain to her how to correctly

sandra's work:
amount of sugar for 1 cookie: 15 x 1/4c = 15/4 = 3.75 c
amount of sugar for 90 cookies: 3.75 c x 90 = 337.5 c

She incorrectly multiplied 15 X 1/4

Step-by-step explanation:

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