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vladimir1956 [14]
3 years ago
5

Which equation represents the following word problem?

Mathematics
2 answers:
vovikov84 [41]3 years ago
5 0

Answer:

its the last one

Step-by-step explanation:

arlik [135]3 years ago
5 0

Answer:

D

Step-by-step explanation:

D is the right answer because it involves multiplying the number of pencils by 0.25, the price of the pencils, which will give you the correct price.

It also makes that equal to 9, since the student only has $9.

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3 years ago
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a spherical balloon is deflated at a rate of 256pi/3 cm^3/sec. at what rate is the radius of the balloon changing when the radiu
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What you need to look for is \frac { dr }{ dt } when r=8.

Now:

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\\ \\ =-\frac { 64 }{ 3{ r }^{ 2 } } \\ \\ When\quad r=8,\\ \\ \frac { dr }{ dt } =-\frac { 64 }{ 3\cdot { 8 }^{ 2 } } =-\frac { 1 }{ 3 } \\ \\ Answer:\quad -\frac { 1 }{ 3 } \quad cm/sec
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