09B Test

[calcgal]

I was working through the 09B Test and can't figure out 4 of the problems.

09B-38 A basketball court is 84 ft long, and the basket is 10 ft off the ground. If a person 80 ft from the basket releases the ball 5 ft off the ground at an angle of 28 degrees and makes the basket, what is the time of flight of the ball? (Answer is 1.53 sec)

09B-47 Five 100 gram samples of iron at room temperature received separate heat inputs of 50 to 250 calories in 50 calorie increments. The sample temperatures increased by 5, 10, 12, 16, and 25 Kelvins, respectively. What is percent error in the best fit specific heat of iron if the actual value is 0.106 cal/gK? (Answer is -3.65%)

09B-57 An algae population was initially 1000 algae, and it doubled every 3 days. What was the growth rate after 6 weeks? (Answer is 2630 algae/min)

I also can't figure out the geometry problem 09B-60.

[88bobcat]

[88bobcat]

[sinkokuyou]

[88bobcat]

[88bobcat]