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)

Which are factor pairs of 350? choose all answers that are correct. a) 30 and 12 b) 35 and 10 c) 70 and 5 d) 2 and 125

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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?