A hiker wants to estimate the height of a mountain before attempting a climb to the top. Her first
measurement shows an angle of elevation to the top of
the mountain as 63.4º. Her second measurement, taken
950 ft closer to the base of the mountain, yields an
angle of elevation of 75.3º. From these measurements,
estimate the height of the mountain. Round to the
nearest hundred feet.

step-by-step explanation:

this is not a question

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.