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snow_tiger [21]
3 years ago
5

15. Lily deposited $570 into her account in 15 days. Write an equation to

Mathematics
1 answer:
Aleks [24]3 years ago
8 0

Answer:

38

Step-by-step explanation:

To find the unit rate (How much money in one day), you have to divide the amount of money by the amount of days and 570÷15=38

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The radius of a cone is decreasing at a constant rate of 7 inches per second, and the volume is decreasing at a rate of 948 cubi
nadezda [96]

Answer:

Step-by-step explanation:

We have volume of cone as

V=\frac{1}{3} \pi r^2 h

and for a cone always r/h = constant

Given that r' = rate of change of radius = -7 inches/sec

(Negative sign because decresing)

V' =- 948 in^3/sec

Radius = 99 inches and volume = 525 inches

Height at this instant = \frac{525}{\frac{1}{3} \pi (99)^2} \\=\frac{0.1607}{\pi}

Let us differentiate the volume equation with respect to t using product rule

V=\frac{1}{3} \pi r^2 h\\V' = \frac{1}{3} \pi[2rhr'+r^2 h']\\-948 = \frac{1}{3} \pi[2(99)(-7)(\frac{0.1607}{\pi})+99^2 h']\\

-948 = \frac{1}{3} \pi[2(99)(-7)(\frac{0.1607}{\pi})+99^2 h']\\-948 = 33(3.14)(-2.25/3.14  + 99 h')\\-9.149=-0.72+99h'\\-8.429 = 99h'\\h' = 0.08514

Rate of change of height = 0.08514 in/sec

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3 years ago
Write an equivalent expression using the given property.
gayaneshka [121]
3xy -6x

just multiply 3x by y and 3x by -2
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If Susie has 2 apples and she gave bill 1 how many apples does susie have?
Ludmilka [50]

Answer:

susie has 1 apple

7 0
3 years ago
Yall please help meee
madam [21]

Answer-

x=0;y=3

x=1;y=-1

x=2;y=-5

x=3;y=-9

7 0
3 years ago
81/15 + -14/5 plz it is for a test
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Answer:

13/5 and/or 2.6

Step-by-step explanation:

6 0
2 years ago
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