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Kaylis [27]
3 years ago
7

Plz help plzzzzzzzzz

Mathematics
2 answers:
chubhunter [2.5K]3 years ago
6 0

Answer:

47.13cm

Step-by-step explanation:

2×3.142×7.5cm

Vesna [10]3 years ago
4 0

Answer:

47.13

Step-by-step explanation:

c=2πr

c=2×3.142×7.5cm

c=6.284×7.5cm

c=47.13cm

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The value of a graphing calculator is $225. After 2 years, the value of this calculator is $160. Find the value of the calculato
OlgaM077 [116]
To find the value of the calculator after 5 years, you need to find how much the price of the calculator drops each year. From years 0 to 2, it seems that the price of the calculator has dropped by some amount of money x. To find how much the calculator drops each year, first you will need to subtract 160 from 225 (225-160) to get 65. Next, you need to divide 65 by 2 (65/2) to get $32.50.

I believe that in order to find the price after 5 years, you will need to multiply 32.5 by 5 (32.5*5) to get $162.50. Next you would subtract $162.50 from $225 (225.00-162.50) to get $62.50.

So, the price of the calculator after 5 years is $62.50!

I hope this helps!
3 0
3 years ago
A trumpet has a length of 140cm. The first valve lowers the root note by two semitones (f1/f0 = 2-2/12) and the second valve low
Alexxandr [17]

Answer:

a.  17.145cm

b. 8.325cm

c. 0.846

d. 2.896

Step-by-step explanation:

It is known that frequency is inversely proportional to length.

Case 1: The player presses only the first valve.

f₁/fo = 2^{-2/12} = lo/l₁

given that lo= 140cm.

l₁ = 2^{2/12}lo = 157.145

change in length:

l₁ - lo = 157.145 - 140 = 17.145cm

Case 2: The player presses only the second valve.

f₂/fo = 2^{-1/12} = lo/l₂

l₂ = 2^{1/12}lo = 148.325cm

l₂  - lo= 148.325-140 = 8.325cm

Case 3: The player presses both the first and second valve.

Change in length is the sum of change in length when they are individually pressed.

l₃ - lo = 17.145+8.325 = 25.47cm

l₃ = 25.47cm+lo = 165.47cm

f₃/fo  = 2^{-n/12} = lo/l₃

f₃/fo = 2^{-n/12} = 140/{165.47 = 0.846

2^{-n/12} = 0.846\Rightarrow n/12 = -log(0.846)/log(2) = 0.2413

n = 0.2413*12 = 2.896

5 0
3 years ago
Graph the system by hand.
weqwewe [10]

Answer:

dont khan academy

Step-by-step explanation:

idk

why

u

cheet

7 0
3 years ago
Worth all my points plus Brainlist answer number 14 please it’s due in three hours
Lana71 [14]

Answer:

Answer below

Step-by-step explanation:

2.08

2.082

2.8

2.82

√8 (it's 2.8284)

3 0
3 years ago
Read 2 more answers
Slove it 3x-5=x+3 :)))))))
lidiya [134]

Answer:

x=4

Slove it 3x-5=x+3

3x-5=x+3

3x-x-5=3

2x-5=3

2x=3+5

2x=8

x=4

5 0
3 years ago
Read 2 more answers
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