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ollegr [7]
3 years ago
9

The 2006 value of a car was $18,000. In 2016, it was worth $4000. If the annual percent of decay has been constant, what is the

annual percent of decay? Please show your work!
Mathematics
1 answer:
MArishka [77]3 years ago
7 0

Answer:

7.77% per year

Step-by-step explanation:

From 2006 to 2016 the price of the car went from $18.000 to $4.000. So it lose 77.77% of its value in 10 years.

To know the total percentage of decay in 10 years we use the rule of three.

If $18.000 represents %100

What percentage does $4000 represents?

($4000 * 100 / $18.000) = 22.22%

If the final value is 22.22% of the initial value, then it lose 77.77% of its value. (100% - 22.22% = 77.77%_

Given that the percent of decay was constant, the annual percent of decay is: 77.77% / 10 years = 7.77% per year.

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In Cos A = 0.4 Find The Value Of Cos 3 A.<br><br><br><br>Thenku ☃️<img src="https://tex.z-dn.net/?f=%20%5C%3A%20%5C%3A%20" id="T
s2008m [1.1K]
Answer:
- 0.944

Step-by-step explanation:
We know that,
cos 3A = 4 cos³A - 3 cos A (formula)

So,
If cos A = 0.4,

cos 3A = 4 cos³A - 3 cos A
cos 3A = 4 × (0.4)³ - 3 × (0.4)
cos 3A = 4 × 0.064 - 1.2
cos 3A = - 0.944


Hope it helps ⚜




3 0
2 years ago
Read 2 more answers
On a dessert table there is one cupcake for every 5 cookies . There are 85 cookies for dessert table. how many cupcakes are on t
vredina [299]
I believe it’s 17

85/5=17
7 0
2 years ago
Samuel has to sell concert tickets worth at least $90. The price of a child ticket is $8, and the price of an adult ticket is $1
alina1380 [7]

Answer:

The second graph is correct, that the line intersects x at 6 and y at 11.5

Step-by-step explanation:

Samuel has to sell at least $90 for his concert. According to the graph, if Samuel sells only child ticket, he will have to sell 11.5 tickets.

If Samuel sells only adult tickets, he will have to sell at least 6.

The correct graph is the second one, that the line intersects x at 6 and y at 11.5

4 0
3 years ago
Find the value of X round your answer to the nearest tenths
vlabodo [156]

Answer:

x = 17.9

Step-by-step explanation:

tan40^{0} =\frac{15}{x}

x=\frac{15}{tan40^{0} } =17.88

rounded: 17.9

Hope this helps

6 0
2 years ago
Find the area of this irregular polygon.
Rainbow [258]

Answer:

970m^{2}

Step-by-step explanation:

This polygon can be divided in two figures: one is a triangle, an the other one is a square.

We'll begin calculating the triangle's area, using the following formula:

At= \frac{b.h}{2}

Where:

H= height = 30 m

B = 9 m + 9 m + 20 m = 38 m

As you can see, I added both sides of the triangle that measure 9 m and also the lenght of the square that measures 20 m! This added up is what the base of the triangle measures on total.

At= \frac{38 m .30 m}{2}

At= \frac{1140 m^{2} }{2}

At= 570 m^{2}

Now we are going to calculate the square's area, that is much more simple:

As= L^{2}

Where:

L=20 m

As= (20 m)^{2} = 400m^{2}

To know the whole figure's area, we add up both areas:

A = At+As = 570m^{2} +400m^{2}=970m^{2}

3 0
3 years ago
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