Can someone help me with these 3 questions ASAP thank you so much:) What is the domain for the exponential function f (x) = –5log(x + 4)?

D colon open bracket x is an element of real number close bracket
D colon open bracket x is an element of real number such that x is greater than 4 close bracket
D colon open bracket x is an element of real number such that x is greater than negative 3 close bracket
D colon open bracket x is an element of real number such that x is greater than negative 4 close bracket

AP Macroeconomics students were given an exam on a particular topic. Each week, they were tested with a comparable exam on the same topic and the average score for the class was measured. The function M (t) = 80 – 20log(t + 1) models the average score for the class after t weeks. How many weeks will it take for the average score of the class to equal 60?

8 weeks
9 weeks
10 weeks
11 weeks

The pH level, P, of a liquid can be determined from the hydronium ion (H3O+) concentration, c, using the equation P = –log(c). If the pH level of cranberry juice is 2.5, what is the hydronium ion concentration?

3.16 x 102
1.22 x 101
3.16 x 10–3
3.98 x 10–1