Which of the following is an arithmetic sequence? a. –20, –25, –30, –35, –45, b. 7.2, 3.6, 1.8, 0.9, 0.45, c. 3.1, 6.2, 12.4, 24.8, 49.6, d. –15.6, –12.9, –10.2, –7.5, –4.8,

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this