Instructions: Answer all multiple- choice questions. Must show work for all ques

Question

Instructions: Answer all multiple- choice questions. Must show work for all questions in order to get credit 1) Add 1 yard, 1 ft, and 1.5 in, giving the total in rods. 1 Rod- 5.5 yards a) 12 and 75/132 b) 2 and 75/132c) 3 and 75/132 d) 5 and 75/132 2) Add 24 cm, 5.76 m and 19.4 decameters giving the total in kilometers. a) 0.2 km b) 0.4 km c0.6 kmd) 0.8 km 3) Assuming the earth to be 7,800 miles in diameter, what periood of time elapses when a point of an equator rotates through a distance of 260 miles? a) 96 minutes b) 120 minutesc) 60 minutes d 48 minutes 4) A study showed that one heartbeat consisted of 0.09 sec in which the upper chambers contracted alone, 0.28 sec in which the lower chambers contracted alone, and 0.38 sec in which all chambers relaxed. How many times was the heart beating per minute? a) 70b)60 c) 53 d)43

Explanation / Answer

1) 1 yard = 1/5.5 rod

1 ft = 1/3 yard = 1/16.5 rod

1.5 in = 1.5/12 ft = 1.5/12*3 rod

hence

total = 0.284090909 rod = 75/2*132 rods

this is option b)

2) 24 cm = 24*10^-2 m

5.76 cm = 5.76*10^-2 m

19.4 decameters = 194 m

hence

total = 0.1942976 km

option a)

3) d = 7800 miles

hence

pi*d = 24 hours

260/pi*d = t/24

260*24/pi*7800 = t = 0.2546 hrs = 15.27 min

so no option is correct

4) dt = 0.09 s

dt' = 0.28 s

dt" = 0.38 s

dt total = 0.75 s

hence beats per minute = 60/0.75 = 80 bpm

answer a)

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