Afood packet is dropped from a helicopter and is modeled by the function f(x) = -12x2 + 19200. the graph below shows the height f(x), in feet, of the food packet at different times x, in seconds:
use the graph to determine the reasonable domain of f(x) based on the context.
all real numbers
x ≤ 19200
-40 ≤ x ≤ 40
0 ≤ x ≤ 40

For the equations below which statement is true ?

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

If the scale factor between two circles is 2x/5y what is the ratio of their areas?