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kupik [55]
3 years ago
7

Area of plane and composite figures

Mathematics
1 answer:
Phoenix [80]3 years ago
6 0
Dont click the link they track your ips
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A cell phone cost $10 for the phone and $2 per hour that someone talks on the phone. If Jeremiah spent $30 total, how many hours
GREYUIT [131]

Answer:

10 times 2x = 30

Step-by-step explanation:

Tried my best

5 0
3 years ago
Helpppppppp!! I will mark brainliest if you show work!
Murrr4er [49]

Answer:

$798

Step-by-step explanation:

Jack invested $7100 compounded continuously at an interest rate of 3⅝% which is 0.03625

Formula for future value of continuous compounding is;

FV = PVe^(rt)

Where;

FV is future value

PV is present value

r is interest rate

t is time

After 19 years;

FV = 7100 × e^(0.03625 × 19)

FV = $14137.697

Henry invested $7100 compounded monthly at an interest rate of 3⅜% which is 0.03375.

Formula for FV of monthly compounding is;

FV = PV(1 + i)^(n)

FV = 7100(1 + 0.03375)^(19)

FV = $13339.922

Thus, amount Jack has more than Henry = 14137.697 - 13339.922 = $797.775

Approximating to the nearest dollar gives $798

5 0
2 years ago
Write the decimal as a fraction or mixed number in simplest form.<br> 5.22​
fredd [130]

Answer:

5 11/50

Step-by-step explanation:

i used an online calculator and thats what it said

8 0
3 years ago
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What is the constant of proportionality in the equation y = 7x? constant of proportionality =
stiks02 [169]
The constant of proportionality is 7.
6 0
3 years ago
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Please help me! I’m failing!!!
choli [55]

a. If G(t) = a (1 + r)ᵗ, then G(0) = a corresponds to the starting area of the glacier, which is given to be 142 acres. So a = 142.

The area of the glacier shrinks by 4.4% each year. This means that after 1 year, the area is reduced to

142 - (4.4% of 142) = 142 (1 - 0.044) ≈ 135.75 acres

After another year,

135.75 - (4.4% of 135.75) = 135.75 (1 - 0.044) ≈ 129.78 acres

or equivalently, 142 (1 - 0.044)² acres.

And so on. After t years, the glacier would have an area of

G(t) = 142 (1 - 0.044)ᵗ   ⇒   G(t) = 142 × 0.956ᵗ

b. If the year 2007 corresponds to t = 0, then 2012 refers to t = 5. Then the area of the glacier is

G(5) = 142 × 0.956⁵   ⇒   G(5) ≈ 113.39 acres

c. Simply take the difference between G(5) and G(0) :

G(5) - G(0) ≈ 142 - 113.39 ≈ 28.61 acres

d. The average rate of change of G(t) from 2007 to 2012 is given by the difference quotient of G(t) over the interval 0 ≤ t ≤ 5 :

ARC_{[2007,2012]} = \dfrac{G(5) - G(0)}{5 - 0} \approx \dfrac{113.39 - 142}5

so that ARC ≈ -5.72 acres/year. This rate tells us that a little less than 6 acres of glacial ice is lost each year, based on the reduction over the first 5 years.

e. The year 2017 refers to t = 10, so now we compute

ARC_{[2012,2017]} = \dfrac{G(10) - G(5)}{10 - 5} \approx \dfrac{90.55-113.39}5

which comes out to about ARC ≈ -4.57 acres/year. Since this rate is smaller than the ARC between 2007 and 2012, this means that the glacial ice is disappearing at a slower rate in later years.

8 0
2 years ago
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