Zara goes to the book fair and buys 3 comic books for $5 each, 2 chapter books for $9 each, 4 posters for $2 each, and 1 picture book for $7. Write an equation that can be used to find how much Zara spends at the book fair. Show your work.

Which answer is the solution set to the inequality |x|< 9? a. x< -9 or x> 9 b. x> -9 and x< 9 c. x> -9 or x< 9 d. x< 9 and x< 9

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Adoctor administers a drug to a 38-kg patient, using a dosage formula of 50 mg/kg/day. assume that the drug is available in a 100 mg per 5 ml suspension or in 500 mg tablets. a. how many tablets should a 38-kg patient take every four hours? b. the suspension with a drop factor of 10 ggt/ml delivers the drug intravenously to the patient over a twelve-hour period. what flow rate should be used in units of ggt/hr? a. the patient should take nothing pills every four hours. (type an integer or decimal rounded to the nearest hundredth as needed.)