Several psychology majors conducted an experiment around campus, asking students to count backwards from 40 to 0 as fast as possible. From their findings, they concluded that out of every 15 students, only 6 could accurately count backwards in less than 15 seconds. They repeated this experiment with the professors. They discovered that their success rate was 140% of the students' success rate. From the list of participants, they randomly selected 10 students and 10 professors. The probability that 4 students who completed the task were selected is S and the probability that 4 professors who completed the task were selected is R. Find the absolute difference in S and R.

Step-by-step explanation:

POINTS:

- Out of every 15 students, 6 were successful in the task.

- The professors' success rate is 140% of the students' success rate.

j

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

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also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.