Consider the function f(x)=cos(0.9x). How much does x have to increase by for 0.9x to increase by 
?
   

What is the period of f?
   

Consider the function g(x)=sin(5πx).

How much does x have to increase by for 5πx to increase by 2π?
   

What is the period of g?

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Rewrite the hyperbolic equation 4y^2 -9x^2 +54x-8y-113=0

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?