Math Homework Help Percentages
December 30th, 2010
Question: Percentage increase – Maths homework help ?
Hi,
I’m really stuck on this one question and how you work it out. If anyone could help that would be great 
The sides of a square are increased by 10%. By what percentage is the area increased?
Thanks in advance!
Answer: A = s² Let’s increase s by 10%: s + 10%s = s + 0.1s = 1.1s,
So the new increased area is A* = (1.1s)² =
1.21 s² =
1s² + .21s² = (and since s² = A)
A + .21A which is the original area increased by 21%.
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Math Help Calculator
December 29th, 2010
Question: math calculator problem!!?
how to write each percent as a decimal and mixed number or a fraction in the simplest form!?
these are the problems i need help with.
ur suppost to type out on the calculator so how do i get the answer??
Answer: Any percent can be transformed into a decimal by dividing by 100.
25% is 0.25
30% is 0.30
(divide 25 by 100 = 0.25
divide 30 by 100 = 0.30)
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Math Help Irc
December 28th, 2010
Question: Math Test Help, grade 12 functions!!!?
Hi, I have a few practice questions given by my teacher in preparation for tomorrows math test on Trigonometric Functions…The following four questions are the hardest ones from my practice sheet. Can you please help me, if you can by showing your work on any of them so i can have a better understanding on doing them in the future. Thank-you very much!
1) Describe function y=2tan(πx-π/2)-1
please state its range, values for which the function is undefined.
2) A ferris wheel chair height is h(t)=15cos(π/3 t – 4)+18 where Bill is in metrtes. What are the possible heights?
3) h(t)=3cos(π/7 t)-6, 1< t <11. When is the Instantaneous Rate of Change (IRC) = 0?
4) A wheel has a diameter= 70cm. 1 revolution in 0.25seconds at top speed.
What is the angular velocity (radians per second) and how far does the wheel travel in one minute?
Answer: use the Lagrange’s theory
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