Erica S.

A team of archaeologists recovered wooden artifacts believed to be 4000 years old. How much carbon-14 has been lost from the wood?   the decay rate for carbon -14 is 0.00012    I can't figure... more

Suppose $5000 is invested at interest rate k, compounded continuously, and grows to $6954.84 in 6 years. Find interest rate. Find exponential rate, find balance after 10 years, find the doubling... more

If you enclose a rectangle garden using a side of a building as one side of the rectangle, what are the dimensions of the garden if it is to be the maximum area that you can enclose with 42 feet of... more

A boat travels 16 miles upstream and 15 miles downstream. The total time for both parts of the trip is 9 hours. The speed of the boat in still water is 9 mph. Find the speed of the current. 

f(x)=2x-3 and g(x)=√4x+3   find (f ° g)(x) Find the domain of (f ° g)(x) Find (g ° f)(x) Find the domain of (g ° f)(x)   can someone lead me in the right direction on how to do these??

given that f(x)=x^2-2x+2 and g(x)=√5+2x   (g-f)(x), (f/g)(x), domain of (f/g), the domain of (g)   How in the world do I do these???

I don't understand....... The questions is: Use a graphing calculator to find the intervals on which the function f(x)=x^3-3x^2+2 is increasing or decreasing and find any maxima or minima. Can... more

I cannot seem to get y by itself and make it work in a graph. I need to determine whether the following is a function: y^2=3x^2-4x-8. Can someone help explain how to get y by itself so I am able to... more

I am so confused!!! Please help with these two. The curren in a stream moves at a speed of 4 mph. A boat travels 5 mi upstream and 13 mi downstream in total time of 2 hr. What is the speed of the... more

solve: 8/(x-2) +8/(x+2)=3 solve the equation by completing the square: z2 + 14z + 27=0 Solve the equation by factoring or the quadratic formula: 2m2 + 4m + 1 = 0 solve the problem: a lot is... more