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kirill [66]
3 years ago
5

rachel is frosting the top of two cakes and wants to know which cake will require more frosting. one cake is round with a diamet

er of 8 inches. the other cake a square with the length of 9 inches. the top of which cake has a larger area? how much larger is it?​
Mathematics
1 answer:
Jet001 [13]3 years ago
4 0

Answer:

The square cake is has a larger area by about 40.73 square inches

Step-by-step explanation:

Find the area of the top of each cake.

The square cake has an area of 81 sq inches,   ( length x width = Area, the

                                                                                    length is 9)

The round cake has an area of 16π, which is about 50.27 square inches

  (A = πr², here r is 4, radius is half the diameter)

81 - 16π =  81 - 50.27 =  40.73 square inches

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What is the multiplicative rate of change of the function? The table represents an exponential function.
zhannawk [14.2K]

Answer:

  • <u>The multiplicative rate of change of the function is 0.5</u>

Explanation:

The <em>multiplicative rate of change</em> is the ratio between consecutive entries.

Naming r the multiplicative rate of change, if it is constant you get:

  • r = second entry / first entry = third entry / second entry = fourth entry / third entry.

Here:

  • second entry / first entry = 0.125 / 0.25 = 0.5
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In general, exponential functions have constant multiplicative rate of changes.

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Jenna can clean the gutters at her house in four hours. Her older brother, John, can clean the gutters in three hours, if they w
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Answer:

1 hour and 42.8 minutes

Step-by-step explanation:

To answer this question let's call t_1 while it takes Jenna to clean the gutters

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The speed of each one is:

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\frac{1}{t} = \frac{1}{4} + \frac{1}{3}= \frac{7}{12} g/h

t = \frac{12}{7} h

Then, both together paint \frac{7}{12} of gutters for each hour.

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