Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar(s).

if ∆abc and ∆gef are congruent, the value of x is
and the value of y is
.

What is the number 321,000,000 in scientific notation? also what is the number? ?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Aculture started with 3000 bacteria. after 5 hours it grew to 3900 bacteria. predict how many bacteria will be present after 9 hours