If x has a probability density of

f(x)= ke^(-3x) for x> 0
= 0 otherwise

find

a. find k
b. p(0< x< 1)
c. f(x)
d. use f(x) to find p(0< x< 1)

What is a graph with a never ending line called?

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.