In one​ class, homework is worth 25​% of the final​ grade, each of 3 projects is worth 20​%, and a final exam is worth 15​%.​(a)If a student has an 83 homework average and a 95 on the first​ project, what is the​ student's grade at this​ point?​(b)If a student gets a 78 on the second project and a 76 on the third​ project, what is the lowest grade the student can get on the final exam to get an 80 overall in the​ course?Sum(weight k *xk/ Sum(weight k)

At the start of the school year,the ratio of boys to girls in drama club is 5 to 3.After Winter Break, 6 girls join the drama club so the number of boys in the club is equal to the number of girls in the club .How many more girls need to join the club to make the ratio of  boys to girls3 to 5

Suppose that you have bought a total of 3200 shares of a stock of a particular company. You bought 1400 shares of stock at $17 per share 700 shares of stock at $12 per share and the remaining shares at $22 per share. What is the average price you paid per share of stock?

If we have a score of 100 and is 20% of the grade and a score of 89 which is 40%.  What is my grade?

For a Saturday service, if the weather is sunny, you will take in $9,000; if the weather is cloudy, you will take in $2,000; if it is rainy, you will only take in $1,200. The weather is sunny 65% of the time, and cloudy 25% of the time. How much money do you expect to take in on any given Saturaday?

A player on a college basketball team scored a total of 630 points during her second year in college. In her third year, she improved her shooting, and her total points increased by 20% over her second year. How many points did she score in her third year in college?

A bank service charge is $8.25 per month for the first 10 transactions, plus $1.25 for each additional transaction. If you make 14 transactions in a month, how much will it cost you in bank service charges?

A math course has two midterms and a final exam. Midterm 1 is worth 18% of the final grade, midterm 2 is worth 36% of the final grade, and the final exam is worth 46%. The teacher assigns grades as marks on 100. If a student recieved a mark of 78.1 on the first midterm and 72.6 on the second midterm, what mark does he need on the final exam to get a final grade of 80 in the course. Please use excel for all calculations. Give the answer to 5 decimal places.