Answer the following questions for the functionf(x) = x \sqrt{x^2 + 25}defined on the interval [ -7, 5 ] .a. f(x) is concave down on the interval tob. f(x) is concave up on the interval toc. the inflection point for this function is at x=d. the minimum for this function occurs at x=e. the maximum for this function occurs at x =

Which of the following expressions is equal to 2x^2+8

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.