HELP!!! MATHS

mkelly1992

maths problem??
HELP!!! MATHS
Have 20 Calc problems, and stuck on 5, only have 2 tries left to submit them or I loose credit so getting nervous! Thanks for your help!
Let

4)Use interval notation to indicate the domain of f(x)= (11-6x)^(1/2) Note:read as square root of (11-6x).
Note: When entering interval notation in WeBWorK, use I for , -I for , and U for the union symbol. If the set is empty, enter "{}" without the quotation marks.
Domain =

7)Given the logarithmic function : y=logax note(that should be log sub a times x)
(a) What is the domain of the function?
(b) What is the range of this function?

Please enter an interval below, including appropriate parentheses and commas.

(a)
(b)

11)Put the function P=15(3.2)^(t) in the form P0e^(kt) Note this one is read as P sub zero times e^kt. When written in this form, you have:
k=
P0+

TheBody

Ok, lets have a go at the first one so. You are trying to find the domain of:

[latex]\sqrt{11-6x}[/latex]

So when it comes to square roots, you can't take the square root of a negative number. What do you think this means for 11-6x?