toxicsugar22
  • toxicsugar22
Delbert prepares a 25% glugose solution of by mixing 2 ml of glucose with 8 ml of water. If he adds x ml of glucose to the solution, its concentration is given by C(X)=2+x/8+x toxicsugar22: How many ml of glucose should delberrt add to increase the concentration to 50%
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
first find how much glucose it has by setting C(x)=.25\[.25 = {(2+x) \over (8+x)}\] find how much glucose does a 50% concentration solution has by setting the equation equal to 50%:\[.50 = {(2+x) \over (8+x)}\] Last, subtract the 50% x from the 25% x and you will have how much is need to add. is that right?
toxicsugar22
  • toxicsugar22
yes
toxicsugar22
  • toxicsugar22
thamks

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anonymous
  • anonymous
np
toxicsugar22
  • toxicsugar22
can u help me with on more
anonymous
  • anonymous
sure, put it up
toxicsugar22
  • toxicsugar22
The cost in thousands of dollers for extracting p% of a precious ore from a mine is given by the equation C(p)=360p/100-p Complete this showing the cost of extracting various percents of the ore . if 15 is P then what is C
toxicsugar22
  • toxicsugar22
do u get it
anonymous
  • anonymous
don't yu just substitu 15 for P in the C(p) equation?
toxicsugar22
  • toxicsugar22
not in the 360p/100-p
toxicsugar22
  • toxicsugar22
ok so how do i do that
anonymous
  • anonymous
what is 15 ? p=15% ?
toxicsugar22
  • toxicsugar22
yes
toxicsugar22
  • toxicsugar22
so how do i do that can u show me please
anonymous
  • anonymous
the we know that p =0.15 right?
anonymous
  • anonymous
if we know that the cost is: C(p)=360p/100-p what would it be if p = 0.15? C(0.15) = ?
toxicsugar22
  • toxicsugar22
yes can u show me this one time
anonymous
  • anonymous
C(0.15) = 360(0.15)/100-0.15
toxicsugar22
  • toxicsugar22
yes but it said do not convert percents to decimals
toxicsugar22
  • toxicsugar22
ok i got it
anonymous
  • anonymous
sorry didn't see that 15/100 then
toxicsugar22
  • toxicsugar22
ok i got it
toxicsugar22
  • toxicsugar22
with that question what percent of the ore can be extracted if 540,000 can be spent on the extraction?
anonymous
  • anonymous
now you set C(p) = 540,000 so, 540,000 = 360p/100-p solve for p
toxicsugar22
  • toxicsugar22
can u show me pleae
anonymous
  • anonymous
540000(100-p) = 360p 54,000,000 - 540,000p = 360p 54,000,000 = 540,360p p = 99.93
toxicsugar22
  • toxicsugar22
thanks
anonymous
  • anonymous
np
toxicsugar22
  • toxicsugar22
A computer store sells approximately 300 of its most popular model per year. The manager would like to minimize her annual inventory cost by ordering the optimal numbers of computers, x, at regular intervals. If she orders x computers in each shipment, the cost of storage willl be 6x dollers, and the cost of reording will be 300/x (15x+10) dollers. The inventory cost is the sum of the storage cost and the reording cost. use the distributive law to simplfy the expression for the rerding cost. Then express the inventory cost C as a function of x
toxicsugar22
  • toxicsugar22
can u help me

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