Arla and Bree are twin sisters. Arla is very competitive with Bree in math class, and always wants to do twice as many math problems as her sister Leta and brepresent the number of math questions Alla and Bree complete respectively

15 oranges weigh 3.75 kilograms (kg). if each orange weighs approximately the same, approximately how much does each orange weigh?

Multiply the polynomials (x+3)(x^2-6x+5)

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?