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Please solve all of  these sums as early as possible.

1. A satellite is in a circular orbit 248 km above the equator of the earth, How far must it travel for its longitude to change by 66.0 degrees, Report your answer in km to 2 
decimal places, Assume the radius of the earth is 6, 982.
2. Find the length of the arc s subtended by a central angle of 123°85' in a circle of radius 6.3 cm. Report your answer in cm to 2 decimal places. 
3. A steel bar with a radius of 4 inches is being ground in a lathe. The surface speed of the bar is 11 ft/min. How many revolutions will the bar make in 38 sec. Report your answer to 2 decimal places, 
4. The hour hand of a clock is 77.0 mm long. How far does the tip of the hand travel between 2 o'clock and 7 o'clock? Report your answer in mm to 2 decimal places. 

Sandy invest 1500$ into an account 3.5% interest compounded quart key how much money will be in the account after 8 years

1. The price of the product A was reduced from Rs. 100 to Rs. 90 and, as a result, the quantity demanded has increased from 70 to 75 units. The demand is:
2. inelastic;
3. elastic;
4. unit elastic;
5. cannot be determined from the given information.