02-03-2015
Mathematics

Answered

Please help!

Sarai uses 4 cm3 of face wash each night. The cylindrical container of face wash is 10 cm tall and has a diameter of 5 cm. The container is half empty.How many more days will the face wash last her? Use 3.14 to approximate pi, and round your answer to the nearest whole number.

A.196 days

B. 98 days

C. 49 days

D. 25 days

Answer :

zswanekamp zswanekamp

02-03-2015

first you need to find how much is left in the container by finding the whole volume.
cylinder volume= πr²h where r is the radius and h is hight
V= (3.14)*(5²)*(10)
V=(31.4)(25)
V=785cm³ is the total volume
now half has been used so divide that number in half
785/2= 392.5cm³
now she uses 4cm³ a day so divide
392.5/4= 98.125
round to the nearest whole number
answer is B 98

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pennieboravensovmcsj pennieboravensovmcsj

19-07-2018

Well I took the test and used the 98 days answer but it was wrong its actually 25 days

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