How do you write 345,000,000,000 in scientific notation

From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day

Ateam of runners is needed to run a 1 2 -mile relay race. if each runner must run 1 4 mile, how many runners will be needed?

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?