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A man stands 9 metres from the base of a tree. He knows the distance from where he is standing and the top of the tree is 15 metres. How tall is the tree?

a 2 + b 2 = c 2 a : 9 b : unknown c: 15 b 2 =c 2 - a 2 so b 2 = 225 - 81 =144 so b=12
JM
Answered by Jack M. • Maths tutor
3728 Views

Describe and Explain one or more landforms produced by coastal depositon:

Material is deposited by constructive waves when waves no longer have enough energy to transport the material or there is an increase in the amount of eroded material being carried leading to the formation o...
PM
Answered by Polly M. • Geography tutor
5522 Views

The mean of 5 numbers is 42. The 5 numbers are 45,29,63,42 and X. Find the value of X.

42 x 5 = 210. 45+29+63+42 = 179. 210 - 179 = 31 X = 31
JF
Answered by Joseph F. • Maths tutor
5252 Views

How do you know when to use the imperfect tense and the preterite tense?

There are two simple past tenses in Spanish: the imperfect and the preterite tenses. The imperfect tense is used to describe continuous past actions, something which used to happen or to describe what someth...
KD
Answered by Kieran D. • Spanish tutor
2494 Views

Discuss advantages and disadvantages of soft engineering as a river flood management strategy.

Soft engineering encompasses techniques that involve working with, rather than controlling, the environment. Examples can include: forecasts, flood warning systems, land use management on floodplains, wetlan...
LT
Answered by Lydia T. • Geography tutor
36775 Views