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3 years ago

Campatible numbers are numbers in a problen that are easy ti compute

Mathematics

1 answer:

Thepotemich [5.8K]3 years ago

8 0

Mentally

As they are numbers which you can do mental math with since they are whole numbers.

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What is 5x –7(2)-7(4)?

BartSMP [9]

Answer:

5x-42

Step-by-step explanation:

5x-7(2)-7(4)

5x-14-28

5x-42

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4 years ago

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Mariah went to the store to buy a coat. The coat originally cost $120.00. Mariah used a coupon

creativ13 [48]

Answer: $24

Step-by-step explanation:

Mariano saved $24because

120 x 0.2=24

She payed $96

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3 years ago

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1. The number of rabbits on an island is increasing exponentially.

Zina [86]

Answer:

<em>There are approximately 114 rabbits in the year 10</em>

Step-by-step explanation:

<u>Exponential Growth </u>

The natural growth of some magnitudes can be modeled by the equation:

$P=P_o(1+r)^t$

Where P is the actual amount of the magnitude, Po is its initial amount, r is the growth rate and t is the time.

We are given two measurements of the population of rabbits on an island.

In year 1, there are 50 rabbits. This is the point (1,50)

In year 5, there are 72 rabbits. This is the point (5,72)

Substituting in the general model, we have:

$50=P_o(1+r)^1$

$50=P_o(1+r)\qquad\qquad[1]$

$72=P_o(1+r)^5\qquad\qquad[2]$

Dividing [2] by [1]:

$\displaystyle \frac{72}{50}=(1+r)^{5-1}=(1+r)^{4}$

Solving for r:

$\displaystyle r=\sqrt[4]{\frac{72}{50}}-1$

Calculating:

r=0.095445

From [1], solve for Po:

$\displaystyle P_o=\frac{72}{(1+r)^5}$

$\displaystyle P_o=\frac{72}{(1.095445)^5}$

$P_o=45.64355$

The model can be written now as:

$P=45.64355(1.095445)^t$

In year t=10, the population of rabbits is:

$P=45.64355(1.095445)^{10}$

P = 113.6

$P\approx 114$

There are approximately 114 rabbits in the year 10

5 0

3 years ago

Katie practiced the flute for 45 minutes then she ate a snack for 15 minutes next she watched television for 30 minutes until 6:

s344n2d4d5 [400]

4:30 because when you add the minutes then subtract the sum from ^:00 that is answer you get

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3 years ago

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Find the area of a quarter circle with the radius of 6cm

Ronch [10]

Answer:

28.27cm³

Step-by-step explanation:

Area of a circle:

$A=\pi r^2$

First, find the area of a full circle with this given radius:

$\rightarrow A=(3.14159)(6)^2\\\rightarrow A=(3.14159)(36)\\\rightarrow A=113.09734\\$

Now, to find the radius of a quarter circle with the same radius, just divide by 4:

$\rightarrow A = \frac{113.09734}{4}\\\rightarrow A = 28.27433$

The radius of the quarter circle is about 28.27cm³

8 0

3 years ago