Write 1,390,000,000 in scientific notation?

Jon earned $38,000 last year. He paid $6,840 towards entertainment. What percent of his earnings did Jon pay in entertainment expenses?

Devon pays $24.95 for her roller skates. After that she pays$3.95 for each visit to the roller rink. What is the greatest number of visits she can afford if the total amout she spends cannot be more than $76.30

If the mean time between unscheduled maintenance of LCD displays in a hospital's CT scan facility is 4000 hours, what is the probability of unscheduled maintenance in the next 6000 hours

A student wants to report on the number of movies her friends watch each week. The collected data are below: 2 14 1 2 0 1 0 2 Which measure of center is most appropriate for this situation and what is its value? Median, 1.5 Median; 3 Mean, 1.

Which distribution has the greatest spread a. 13.7 - 3.1B. 423.6 - 1.3C. 38.4 - 7.2D. 231.4 - 5.5?

A large university accepts 70% of the students who apply. Of the students the university accepts, 25% actually enroll. If 20,00 apply, how many will enroll?

Compare the rates to find which is greater 315 visitors in 21 days or 714 visitors in 51 days

Which values of P P and Q Q result in an equation with no solutions? 8 3 x + P = 8 3 x + Q 83x+P=83x+Q

Candis took out a payday loan with an effective interest rate of 15,400%. if she had 220 to invest for a year at this interest rate, how much would make in interest? A. 3,388,000 B 338,800 C ... 3388 D 33,880

Pippa has 18 puppies, 12 of the puppies have two ears. what is the percent of the puppies have two ears?