What does the following line of C code output?   double pi = 3.1415927;printf(“PI is %.3f\n”, pi);

Suppose a group of researchers conducted a randomized controlled trial to determine if a safe sex intervention helped prevent chlamydia among college students. In total, 220 college students participated in the randomized controlled trial, of whom 106 were randomized to the intervention condition and 114 to the control condition. Participants in the intervention condition were offered an online educational module on safe sex practices. Participants in the control condition did not receive any specific resources on safe sex practices. After one year, the participants were asked to report if they had chlamydia at any point during follow-up. The data from this study are summarized in table 1.   Table 1. Data from a hypothetical intervention aimed at preventing chlamydia among college students. Chlamydia prevented Yes No Total Condition Intervention 99 7 106 Control 95 19 114 Total 194 26 220   Which of the following calculations provides an estimate of the risk ratio between those in the intervention group and control group?

The accumulation  of agricultural surplus leads to… 

Darius I relied on a system of satrapies which were…

What is the key difference between rivers like the Tigris or the Euphrates and the Nile River? 

Division of labor is important in early civilizations because…

Bill and Ted work in a kitchen.  It takes Bill less time to complete all tasks, as compared to Ted.  Which of the following statements is true?

Which one of the following is a known codec standard for videos?

ENIAC was a decimal based computer.

Which one of the following is a known codec standard for videos?