The equation for the ph of a substance is ph = –log[h+], where h+ is the concentration of hydrogen ions. which equation models the concentration of hydrogen ions (h+) of a solution whose ph is 7.2? [h+] = log7.2 [h+] = -log7.2 [h+] = mc014-1.jpg [h+] = mc014-2.jpg

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

How does a low unemployment rate affect a nation's economy? a. the nation has a higher number of productive resources. b. the nation can spend more money on for unemployed people. c. the nation can save money by paying lower salaries to a large workforce. reset

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4