1. A

    Functions problem - Volume halves every five minutes, what is the function?

    The exact question is: "An ice cream cone is left sitting in the hot sun. Sarah notices that the ice cream melts and loses half of its volume every 5 minutes. If the starting volume was 125 mL, determine a function for the volume, with respect to the amount of time left out in the sun" So I...
  2. Q

    Another one

    A hot-air balloon is floating above a straight road. To estimate their height above the ground, the balloonists simultaneously measure the angle of depression to two consecutive mileposts on the road on the same side of the balloon. The angles are found to be 16o and 12o. How high is the balloon?
  3. N

    Algebra help 2 math problems [20 MINUTES LEFT]

    http://i.imgur.com/b8q8lfV.jpg and http://i.imgur.com/Zv1EUr7.jpg
  4. N

    [5 MINUTES] Need help with a simple Algebra problem.. PLEASE AND THANK YOU

    Write the expression in the standard form a+bi 1/2-5i
  5. D

    Converting minutes and speed to km/hr.

    Been stuck on this problem and unsure how to complete. A horse galloped a mile in 2 min 35 s. What was its average speed in km/h? Any thoughts?
  6. J

    How many mph to travel 2 miles in 13 minutes?

    How many miles per hour would you need to be going to go 2 miles in 13 minutes, and how would you calculate that?
  7. K

    How far will sound wave travel in 2 minutes?

    How would I explain and answer this please? The speed of sound is 331.6 meters per second. in miles how far will sound travel in 2 minutes?
  8. I

    Convert Angle measure to Degrees Minutes Seconds

    I am given -0.335 (no degree sign) I am told that the answer is -20 degrees 20 minutes 24 seconds. If I convert -0.335 as a degree I get -0 degrees 20 minutes 6 seconds If I change -0.335 to degrees I get -19.19408614 degrees then when I convert to Degrees minutes seconds, my answer is -19...
  9. D

    Lowest Cost for Multiple Pricing Plans, Quantity, and Total Minutes

    Ok, I'm embarrased that I even have to ask this question, but here it goes. I would like to calculate the lowest overall price for Cellular minute pricing plans. Plan A: 400 Minutes @ $49.99 Plan B: 1000 Minutes @ $74.99 Plan C: 2000 Minutes @ $99.99 I want a formula that will solve the...
  10. T

    How to divide time in minutes between 5 or less people? last one is should be equal

    Im having trouble dividing the time between 5 people from 0240hrs to 0700hrs, I understand its 52minutes each. But the last one is 0602hrs - 0654hrs, still 6mins short. WHY IS THIS? 240hrs to 0700hrs = 4hrs and 20mins remaining 4hrs x 60mins = 240mins 240mins + 20mins = 260mins 260mins divided...
  11. R

    Minutes of Daylight Per Day

    The number of minutes per day L(d) at 40 degrees North latitude is modeled by the function L(d)=167.5 sin[(2pi/366)(d-80)] + 731 where d is the number of days after the beginning of 1996. (For Jan 1,1996 d=1; and for Dec 31 19996 d=366 since 1996 was a leap year) A) Which day has the most...
  12. M

    Degrees, Minutes, Seconds form (DMS)

    I'm learning about degrees and radians and this came up in my homework. Convert: Example: 54(degrees)45(minutes) to decimal degree form. I know (after using the DMS function on my calculator) that the answer is 54.75 How do I do this without my calculator? How do I convert DMS back and forth?
  13. sharkman

    How Many Minutes?

    A watch loses 0.15 seconds every minute. How many minutes will it lose in one day. My work: There are 24 hours in one day. There are 60 minutes in one hour. So, 24 x 60 = 1440 minutes in one day. There are 60 seconds in one minute. So, 1440 x 60 = 86,400 seconds in one day. 0.15/86,400...
  14. P

    Can a 'how many minutes' question be solved using algebra?

    I am reading a book of sample IQ test questions. One example of which, is the typical 'how many minutes' question. I can answer the question the long way, but I would be very interested to know if such questions can be solved more elegantly using algebra. I also hope this might provide a...
  15. M

    How Many Minutes?

    Skipper can mow his lawn in 20 minutes less times with the power mower than with his hand mower. One day the power mower broke down 15 minutes after he started mowing, and he took 25 minutes more time to complete the job with the hand mower. How many minutes does Skipper take to mow the lawn...
  16. I

    Rates, and minutes

    Jon is given some money by his mother to pick up some milk at a local store. He walks slowly to the store at a rate of 3 km/h for 15 minutes, takes 5 minutes to buy the milk, and then runs home at a rate of 5 km/h. Create a graph to present this information and use the graph to determine how...
  17. M

    Trigonometry with minutes

    Hi guys, i have a maths worksheet that is due in tomorrow and i cant remember how to do some of the questions. The question reads: Find the size of the angle θ, correct to the nearest minute, in cach of the following. I have a right-angled triangle with the value of the opposite angle as 27m...
  18. M

    Large Calculations to Hours, Minutes, Seconds

    Am I correct in thinking I have worked out the following question correctly? Question 1 1.77843714 × 1014 (please note the raising of 14, not sure how to do subscript) divided by 15 thousand million commands per sec. I worked this out as: 177 843 714 000 000 divided by 15 000 000...
  19. C

    does this make sense to anyone? i only have 10 more minutes until its due!!

    5x^2+4x+xy=2 and y(2)=-13, find y'(2) by implicit differentiation. i differentiated it and got dy/dx=(10x+4+y)/(x) ... now what do i do? :(
  20. M

    Revolutions Per Minutes

    A pulley that has a diameter of 8 inches is belted to a pulley that has a diameter of 12 inches. The 8-inch-diameter pulley is running at 1,548 revolutions per minute. If the speeds of the pulleys vary inverselyto their diameters, how many revolutions per minute does the larger pulley make?