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slamgirl [31]
3 years ago
15

PLEASE SHOW HOW YOU GET THE ANSWER STEP BY STEP I DONT KNOW THE PROCESS I NEED TO KNOW HOW TO DO IT PLEASE I WILL MEDAL

Mathematics
2 answers:
WINSTONCH [101]3 years ago
4 0

Answer:

The monthly payment is $316.54.

Step-by-step explanation:

It is given that Charlotte purchased a pool for $7680. The rate of interest is 20.45%.

She use a six-month deferred payment plan with an interest rate of 20.45%.

7680\times \frac{20.45}{100}\times \frac{1}{2}=785.28

The principle amount after six-month deferred payment is

7680+785.28=8465.28

PV=C\times [\frac{1-(1+r)^{-n}}{r}]

Where, PV is present value, C is monthly payment, r is rate of interest and n is number of years.

8465.28=C\times [\frac{1-(1+(\frac{0.2045}{12})^{-36}}{\frac{0.2045}{12}}]

C=316.5444\approx \$316.54

Therefore the monthly payment is $316.54.

lana [24]3 years ago
3 0
Initially, Charlotte owes $7680. She finishes her payments after a total of 6 + 36 = 42 months. Using a simple compounding formula, the amount she owes is worth P at the end of 42 months, where P is: 
  P = 7680 * (1 + .2045/12)^42 = 15616.67379
  Now, the first installment she pays (at the end of six months) is paid 35 months in advance of the end, so it is worth x * (1 + .2375/12)^35 at the end of her loan period. 
  Similarly, the second installment is worth x * (1 + .2375/12)^34 at the end of the loan period. 
  Continuing, this way, the last installment is worth exactly x at the end of the loan period. 
  So, the total amount she paid equals: 
  x [(1 + .2375/12)^35 + (1 + .2375/12)^34 + ... + (1 + .2375/12)^0] 
  To calculate this, assume that 1+.2045/12 = a. Then the amount Charlotte pays is: 
  x (a^35 + a^34 + ... + a^0) = x (a^36 - 1)/(a - 1) 
  Clearly, this value must equal P, so we have: 
  x (a^36 - 1)/(a - 1) = P = 15616.67379
  Substituting, a = 1 + .2045/12 and solving, we get 
  x = 317.82


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4vir4ik [10]

Answer:−47.0

​

​

Step-by-step explanation:Step 1. List horizontal (xxx) and vertical (yyy) variables

xxx-direction yyy-direction

t=\text?t=?t, equals, start text, question mark, end text t=\text?t=?t, equals, start text, question mark, end text

a_x=0a

x

​

=0a, start subscript, x, end subscript, equals, 0 a_y=-9.8\,\dfrac{\text m}{\text s^2}a

y

​

=−9.8

s

2

m

​

a, start subscript, y, end subscript, equals, minus, 9, point, 8, start fraction, start text, m, end text, divided by, start text, s, end text, squared, end fraction

\Delta x=12\,\text mΔx=12mdelta, x, equals, 12, start text, m, end text \Delta y=\text ?Δy=?delta, y, equals, start text, question mark, end text

v_x=v_{0x}v

x

​

=v

0x

​

v, start subscript, x, end subscript, equals, v, start subscript, 0, x, end subscript v_y=\text ?v

y

​

=?v, start subscript, y, end subscript, equals, start text, question mark, end text

v_{0x}=2.5\,\dfrac{\text m}{\text s}v

0x

​

=2.5

s

m

​

v, start subscript, 0, x, end subscript, equals, 2, point, 5, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction v_{0y}=0v

0y

​

=0v, start subscript, 0, y, end subscript, equals, 0

Note that there is no horizontal acceleration, and the time is the same for the xxx- and yyy-directions.

Also, the pumpkin has no initial vertical velocity.

Our yyy-direction variable list has too many unknowns to solve for v_yv

y

​

v, start subscript, y, end subscript directly. Since both the yyy and xxx directions have the same time ttt and horizontal acceleration is zero, we can solve for ttt from the xxx-direction motion by using equation:

\Delta x=v_xtΔx=v

x

​

tdelta, x, equals, v, start subscript, x, end subscript, t

Once we know ttt, we can solve for v_yv

y

​

v, start subscript, y, end subscript using the kinematic equation that does not include the unknown variable \Delta yΔydelta, y:

v_y=v_{0y}+a_ytv

y

​

=v

0y

​

+a

y

​

tv, start subscript, y, end subscript, equals, v, start subscript, 0, y, end subscript, plus, a, start subscript, y, end subscript, t

Hint #22 / 4

Step 2. Find ttt from horizontal variables

\begin{aligned}\Delta x&=v_{0x}t \\\\ t&=\dfrac{\Delta x}{v_{0x}} \\\\ &=\dfrac{12\,\text m}{2.5\,\dfrac{\text m}{\text s}} \\\\ &=4.8\,\text s \end{aligned}

Δx

t

​

 

=v

0x

​

t

=

v

0x

​

Δx

​

=

2.5

s

m

​

12m

​

=4.8s

​

Hint #33 / 4

Step 3. Find v_yv

y

​

v, start subscript, y, end subscript using ttt

Using ttt to solve for v_yv

y

​

v, start subscript, y, end subscript gives:

\begin{aligned}v_y&=v_{0y}+a_yt \\\\ &=\cancel{0\,\dfrac{\text m}{\text s}}+\left(-9.8\,\dfrac{\text m}{\text s}\right)(4.8\,\text s) \\\\ &=-47.0\,\dfrac{\text m}{\text s} \end{aligned}

v

y

​

​

 

=v

0y

​

+a

y

​

t

=

0

s

m

​

​

+(−9.8

s

m​

)(4.8s)

=−47.0

s

m

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3 years ago
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