Creative Garden Flag
Please check my answers to those word problems?
1) The temprature of a patient during an illness is given by the function, T(t)=-0.1t^2+1.2t+98.6, where T is the temprature in F, and t is time in days since the onset of the illness. When is the patient’s temprature highest.
ANS: Day 6, It was 102.2 F.
2)A software company estimates that it will sell N units of a new videogame CD after spending N $’s on advertising, where N(a)=-a^2+300a+6, and a is all real positive numbers less than 300. How many CD’s will it sell
ANS: $150 (It seems the owner of the company is pretty thrift!), 22,494 copies!!! (he’s lucky too!)
3) Creative Landscaping has 60yd of fencing with which to enclose a rectangular flower garden. If the garden is x yd long, express the garden’s area as a function of the length.
ANS: A(x) = 60x-x^2
4)A scout troop is designing a triangular flag so that the length of the base is 7 in less than twice the height, h. Express the area of the flag as a function of h.
ANS: A(h) = h^2-3.5h
#1 and #4 are correct
I’m not sure about #2
#3 is incorrect.
If there is 60 yd of fencing available then the P= 60 by formula
P = 2L + 2W if tells you the L = x
60 = 2x + 2W
60 – 2x = 2W
30 – x = w
Area = L times W
A = x(30 -x) or A = 30x – x^2
Beautiful water fountain on flag stone patio.
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