Algebra 1

Jillian wants to buy candles for winter, in case her electricity and furnace fail. Each candle she plans to use, burns at a rate of 5 mL of was per 15 cm. How many HOURS will it take the candle to burn down completely?
Express the answer to the NEAREST WHOLE NUMBER. (Note: 1mL = 1 cm cubed)
(Hint: A candle is a cylinder; use 3.14 as an estimate for pi.)

I have no idea how to start this. Please show me. Thanks!

  1. 👍
  2. 👎
  3. 👁
  1. You need to restate the question and look for additional information. 5 ml of WAX per 15 cm is NOT a rate. You need ml per unit time and you also need to know the radius of the candle.

    I supect you left out some words by mistake, like the length of time it takes to burn 5 ml, and the radius (which might be what the 15 cm is supposed to be).

    1. 👍
    2. 👎
  2. I'm so sorry, i messed up my spelling.

    Each candle she plans to use, burns at a rate of 5 mL of wax per 15 min. One of these candles has a diameter of
    8 cm and a height of 15 cm. How many hours will is take the candle to burn down completely? Express your answer to the NEAREST WHOLE NUMBER. (Note: 1mL = 1 cm cubed) (Hint: A candle is a cylinder; use 3.14 as an estimate for pi.)

    1. 👍
    2. 👎
  3. The candle burns at a rate of 5/15 = 1/3 cm^3 (cubic cm) per minute. A candle with the dimensions you described has a volume of
    V = (pi*D^2/4)*Height = 753.6 cm^3
    The time that it takes to burn is
    (Volume)/(burn rate)
    = 753.6 cm^3/(1/3 cm^/min)
    = 2261 minutes = 37.6 hours. They want you to round that off to 38 hours.

    1. 👍
    2. 👎
  4. how did you get the 2261 min?

    1. 👍
    2. 👎
  5. when I divide the volume by the burn rate, i get the answer 251.2 min.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Language Arts 7 B

    1. Which question best relates to these details in "Winter". Frog burrow the mud/ snails bury themselves What happen to the frogs in the winter? How do animals differ from people in the winter? Why do snails bury themselves? How

  2. chemistry

    a candle was 27.9 grams. the mass of the candle that burned in 3 minutes was 7.2 grams. a) How many moles of wax were in the candle before it burned ? b) How many molecules are in the candle before it burned? c) How many moles of

  3. Chemistry

    Write a word and balanced chemical equation for a burning candle. I know that the paraffin in the candle has the formula C20H42 , but I don't know what else to do...

  4. Math again

    Winnie the Pooh goes to the honey store to buy a case of honey for the winter. The case of 24 jars of honey cost $27.60. What is the cost of each jar? A) $0.87*** B) $1.00 C) $1.15 D) $62.40

  1. math

    Which is the better buy? Justify each answer. a) 6.2 L of gas for $5.39 or 8.5 L of gas for $7.31 b) 5 candles for $3.00 or 12 candles for $5.99 c) 2 kg of grass seed for $1.38 or 5 kg of grass seed for $2.79

  2. Maths

    a missile guidance system has five fail-safe components. the probability of each failing is 0.05. find these probabilities. a) Exactly 2 will fail b) More than 2 will fail c) All will fail. d) Compare the answer for parts a, b, c,

  3. math

    two candles of the same height are lit at the same time one candle burns completely in 5 hours the other in 4 hours if they are allowed uninterruptedly after how long would one candle be 2.4 times as long as the other?so;ution

  4. math (rate)

    A blue candle is twice as long as a red candle. The blue candle takes 6 hours to burn out, and the red candle takes 15. After 5 hours, what fractional part of each candle is left? The blue candle's length is what fraction of the

  1. Mathematics

    Both candles are 25cm tall. The green candle melts down in 20 minutes and the orange in 25 minutes. What are equations for both of these lines so I can graph them? How much did the orange candle melt down in 5 minutes? How much

  2. Algebra 1

    Andrea is selling candles as a fundraiser. she spent $50 on supplies for making the candles. she plans to sell the candles for $10 each. her profit can be modeled by c(x)=10x-50. what is the domain and range of the function Plz

  3. language arts

    which question best relates to these details in winter. Frogs burrow the mud, snails bury themselves a.what happens to frogs in the winter. b.how do animals differ from people in the winter. c.why do sanils bury themselves. d.how

  4. geometry

    A candle manufacturer sells cylindrical candles in sets of three. Each candle in the set is a different size. The smallest candle has a radius of 0.5 inches and a height of 3 inches. The other two candles are scaled versions of

You can view more similar questions or ask a new question.