• If a plane can travel 500 miles per hour and 400 miles per hour against the wind Find the speed of the wind and the speed of the plane in still air?

• A tree is planted 40m from the base of a street lamp that is 25 m tall. Express L, the length of of the tree's shadow as a function of h, its height.

• how much pure acid is in 250L of a 14% acid solution?

• If f varies jointly as q2 and h, and f=54 when q=3 and h=3, find f when q=2 and h=5

• Roopa Patel won a prize for her work. She invested part of the money in a certificate of deposit at 4% and $3000 more than that amount in a bond paying 6% Her annual interest income was $780. How much did Roopa invest at each rate.

• What is the formula for the number of compositions of k? (composition can be any number of parts) Area: Combinatorics

• solution for chapter 6 of ( first course in finite element method ) by daryl logan fourth edition

• answers for chapter 6 problems

• Please answer Part B: Question 6 in the attachment. Please show working.

• Please answer Part B: Question 7 in the attachment. Please show working.

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