How many triangles can be constructed with angles measuring 80º, 80º, and 40º? more than one one none

What are the relative frequencies to the nearest hundredth of the columns of the two-way table?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours