6. how high above the datum must an aircraft fly so that photographs at a scale of 1: 9600 may be obtained, if the focal length is 8.25 in. and average elevation of the terrian is 800 ft?
a) 2500 ft
b) 4200 ft
c) 5800 ft
d) 7300 ft

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?