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Mathematics 10 Online
OpenStudy (anonymous):

can someone check my answers?

OpenStudy (anonymous):

An observer (O) spots a plane (P) taking off from a local airport and flying at a 23° angle horizontal to her line of sight and located directly above a tower (T). The observer also notices a bird (B) circling directly above her. If the distance from the plane (P) to the tower (T) is 5,000 ft., how far is the bird (B) from the plane (P)? 5429 feet 9063 feet 11,779 feet <---- my choice 12,788 feet

hartnn (hartnn):

yes, 5000/tan 23 is indeed 11779 feet :)you're correct !

OpenStudy (anonymous):

yay i have more i answered and was wondering if you can check @hartnn

OpenStudy (anonymous):

A bird (B) is spotted flying 6,000 feet from a tower (T)). An observer (O) spots the top of the tower (T)) at a distance of 9,000 feet. What is the angle of depression from the bird (B) to the observer (O)? 33.69° 41.81° 48.18° 56.31° <--- my answer

OpenStudy (anonymous):

btw i got like only 3 more for you to check if you want to check them

hartnn (hartnn):

56.31 is correct! and sure :)

OpenStudy (anonymous):

yay

OpenStudy (anonymous):

An observer (O) spots a bird flying at a 35° angle from a line drawn horizontal to its nest. If the distance from the observer (O) to the bird (B) is 21,000 ft., how far is the bird (B) from its nest (N)? 12,045 feet 14,704 feet 16,980 feet 17,202 feet <---- my answer but not sure

hartnn (hartnn):

as usual, thats correct :)

hartnn (hartnn):

21000 cos 35 is 17202.

OpenStudy (anonymous):

yay ok i got only two more

OpenStudy (anonymous):

An observer (O) spots a plane flying at a 35° angle to his horizontal line of sight. If the plane is flying at an altitude of 17,000 ft., what is the distance (x) from the plane (P) to the observer (O)? 20,757 feet 24,251 feet 29,639 feet <----- my answer choice 31,262 feet

hartnn (hartnn):

corrrrrrrect! :)

OpenStudy (anonymous):

yay one more and btw are you a boy or girl?

OpenStudy (anonymous):

Find the length of the base of the following pyramid given the height of the pyramid is 71 meters and the angle of elevation of the base of the pyramid is 42°. 127 feet 158 feet <---- my answer choice 191 feet 212 feet

hartnn (hartnn):

oh, i am a boy :) and i P , the mid-point of base ?

hartnn (hartnn):

is P **

OpenStudy (anonymous):

yes it is there is a picture with the question sir

hartnn (hartnn):

i was getting 156...so yeah, 158 is the nearest :)

OpenStudy (anonymous):

ya thats what i got and just rounded it up

hartnn (hartnn):

thne you're correct :)

OpenStudy (anonymous):

alright thank you for all the help

OpenStudy (anonymous):

i got a 100%

hartnn (hartnn):

Congratulations! :)

OpenStudy (anonymous):

thnx

hartnn (hartnn):

welcome ^_^

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