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3 years ago

15

6x9x+2y-22x-y3x+5y+12

1 answer:

timama [110]3 years ago

8 0

Answer:

6x^9x+2y-22x-y^3x+5y+12

Step-by-step explanation:

Combine like terms:

6x^10+2y+-22x+-xy^3+5y+12

=(6x^10)+(-xy^3)+(-22x)+(2y+5y)

=6x^10+-xy^3+-22x+7y+12

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7100 dollars is placed in an account with an annual interest rate of 5%. To the nearest tenth of a year, how long will it take f

kow [346]

Answer:

After $26.91\ years$ the principle amount value will reach to $26400\ dollars$ .

Step-by-step explanation:

Given that,

Principle Amount $(P)= 7100\ dollars$

Rate of Interest $(R)=$ $5$ %

Total Amount $(A)= 26400\ dollars$

If Principle Amount $(P)$ $=P\ dollars$ , Time $=t\ years$ , Rate of Interest $=R$ % $pa$

when interest is compounded annually:

Total Amount after $t\ years$ $= P(1+\frac{R}{100}) ^{t}$

Now,

$A= P(1+\frac{R}{100}) ^{t}$

⇒ $26400=7100(1+\frac{5}{100}) ^{t}$

⇒ $3.7183=(1+0.05)^{t}$

⇒ $3.7183=(1.05)^{t}$

taking log both sides, we get

$ln(3.7183)=ln {(1.05)^{t}}$

⇒ $1.31327=t\times ln(1.05)$

⇒ $1.31327=t\times 0.04879$

⇒ $t=26.91$

Therefore,

After $26.91\ years$ the principle amount value will reach to $26400\ dollars$ .

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The answer is B
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