In order to make the most accurate calendar, the following system was devised. Leap years occur every 4 years except for years ending in 00, but years divisible by 400 are leap years. In this case, the year is a leap year if it is divisible by 400. Which of the following years...
This problem from China is almost 2000 years old: Find a number that when divided by 3 gives a remainder of 1, when divided by 5 gives a remainder of 4, and when divided by 7 gives a remainder of 2.
When items in a box are put in groups of 3 or 5 or 6, there is always 1 item left over. How many items are in the box if there are fewer than 50?
A STUDENT STUDYING THE FE+3- HSCN equilibrium put into a test tube 10.00ml of 2.00 x 10-3 M Fe(NO3)3 with 10.0 mL of 2.00 x 10-3 M HSCN.THE H+ in the resulting solution was manteined at 0.500.By spectrophotometric analysis of the equilibrium solution, the equilibrium concentra...
Discuss the conclusions of Margaret Mead concerning temperament, and explain how she arrived at her conclusions.
You pull a 18 kg sled across the floor with a strap that is at an angle of 40° above the horizontal with a force 86 N. Find the magnitude of the acceleration of the sled, given that the coefficient of kinetic friction between the sled and the floor is 0.23.
Why are files reduce in an organisation?
A dolphin wants to swim directly back to its home bay, which is 0.85 km due west. It can swim at a speed of 4.30 m/s relative to the water, but a uniform water current flows with speed 2.83 m/s in the southeast direction. (a) What direction should the dolphin head? (b) How lon...
Sheena can row a boat at 2.90 mi/h in still water. She needs to cross a river that is 1.22 mi wide with a current flowing at 1.55 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream. (a) What is her speed with respe...
limit as x-->4- (from the left) of (3[[x]]-5) [[absolute value.]]
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