Whilst swimming, Scarlett can hear the siren only if the sound intensity at her location isgreater than 1.5 x 10 Wm-2.(c)Find the values of d where Scarlett cannot hear the siren. If a shark is spotted near to Brighton beach, a lifeguard will activate a siren to waiSirenThe sound intensity, I, of the siren varies inversely with the square of the distance, d, fromthe siren, where d>0.It is known that at a distance of 1.5 metres from the siren, the sound intensity is 4 watts persquare metre (Wm).(a)9.Show that / =(b)Sketch the curve of / on the axes below showing clearly the point (1.5,4).20-5-

A quantity is said to be inversely proportional to an another quantity when the value of one…

"a shark is spotted near to Brighton beach, a lifequard will activate a siren to wa Siren The sound intensity, I, of the siren varies inversely with the square of the distance, d, from the siren, where d>0. It is known that at a distance of 1.5 metres from the siren, the sound intensity is 4 watts per square metre (Wm). (a) Show that 1= (b) Sketch the curve of / on the axes below showing clearly the point (I.5, 4). 20-

"a shark is spotted near to Brighton beach, a lifequard will activate a siren to wa Siren The sound intensity, I, of the siren varies inversely with the square of the distance, d, from the siren, where d>0. It is known that at a distance of 1.5 metres from the siren, the sound intensity is 4 watts per square metre (Wm). (a) Show that 1= (b) Sketch the curve of / on the axes below showing clearly the point (I.5, 4). 20-

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter12: Quadratic Functions

Section12.8: Joint And Combined Variation

Problem 8P

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