I need some help please I'm stuck <3 Some viruses are more contagious than others. Instead of passing the virus to one new person, imagine each infected person passes it to three. How will this affect how long it takes for the virus to infect everyone on earth? There are 7.7 billion people on Earth.

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?