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likoan [24]
3 years ago
9

Help with 21 and not 22 please

Mathematics
1 answer:
PilotLPTM [1.2K]3 years ago
7 0
So the 170 is the area
and the formula for that is A=lw
so you have a length of 15.5.     
Put those in and you get 170.5=15.5w.
you divide 170.5 by 15.5 and get 11.
the Width is 11.
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A car was originally purchased in January 2010 for 27000 dollars. The car depreciates at a rate of 18% every year.
Maksim231197 [3]

Answer:

Number of year(n) = 3.4 year (Approx)

Step-by-step explanation:

Given:

Purchase value of car = $27,000

Depreciation rate per year (d) = 18% = 0.18

Future price = half of its original value = $27,000 / 2 = $13,500

Find:

Number of year(n) = ?

Computation:

Future price  =Purchase value(1-d)^n\\\\13,500=27,000(1-0.18)^n\\\\0.5=(0.82)^n\\\\n=3.444(Approx)

Number of year(n) = 3.4 year (Approx)

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3 years ago
From an elevation of 3.5m below the surface of water, a northern bottlenose whale dives at a rate of 1.8 meters per section (m/s
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Answer:

d=3.5+1.8t

Step-by-step explanation:

4 0
2 years ago
Find the ratio of the circumference of a circle with radius 1.125 to the circumference of a circle with diameter 2.25. Express y
Alexxandr [17]
<h2>Circumference of circle 1 : Circumference of circle 2 = 1 : 2</h2>

Step-by-step explanation:

Circumference of a circle = πD, where D is the diameter.

Diameter of circle 1 = 1.125

Circumference of circle 1 = π x 1.125

Diameter of circle 1 = 2.25

Circumference of circle 1 = π x 2.25

\texttt{Ratio of circumferences = }\frac{\pi \times 1.125}{\pi \times 2.25}\\\\\texttt{Ratio of circumferences = }\frac{1}{2}

Circumference of circle 1 : Circumference of circle 2 = 1 : 2

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Svetllana [295]
X and 71 are complementary angles
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A plane travels 3,625.26 miles in 6.9 hours. What is the plane’s unit rate?
Sonbull [250]

Answer:

The correct answers are:

a) 3625.26 miles OVER 6.9 miles

b) 36252.6 tenths miles÷ 69 tenths hours

c) 3500 miles over 7 hours = 500 miles over hours

d) 3625.26 miles 10 over 6.9 hours 10 = 36252.6 miles over 69 hours

e) 525.4 miles/h

Step-by-step explanation:

Brainliest please?

7 0
3 years ago
Read 2 more answers
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