Sergio has decided to weigh his reference books. his largest encyclopedia weighs 7.49 pounds, and his largest dictionary weighs 3.91 kilograms. if one pound is equal to 0.4535924 kilograms, which book is heavier, and how many more kilograms does it weigh than the other? a. the encyclopedia weighs 1.61 kg more than the dictionary. b. the encyclopedia weighs 0.87 kg more than the dictionary. c. the dictionary weighs 1.13 kg more than the encyclopedia. d. the dictionary weighs 0.51 kg more than the encyclopedia.

How many days was the temperature above 90 degrees?

What is the expression in factored form? -20x^2 - 12x a. 4x(5x+3) b. -4x(5x-3) c. -4(5x+3) d. -4x(5x+3)

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes