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tatyana61 [14]
3 years ago
13

Given the internal radius of the pipe is 2 cm, the external radius is 2.4 cm and the length of the pipe is 10 cm. Find the total

surface area of the pipe.
Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
3 0

Answer:

sorry if I am wrong. I tried my best

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If you invest $100,000 in an account earning 8% interest compounded annually, how long will it take until the account holds $300
Monica [59]

We have been given that you invest $100,000 in an account earning 8% interest compounded annually. We are asked to find the time it will take the amount to reach $300,000.

We will use compound interest formula to solve our given problem.

A=P(1+\frac{r}{n})^{nt}, where,

A = Final amount after t years,

P = Principal amount,

r = Annual interest rate in decimal form,

n = Number of times interest is compounded per year,

t = Time in years.  

8\%=\frac{8}{100}=0.08

300,000=100,000(1+\frac{0.08}{1})^{1\cdot t}

300,000=100,000(1.08)^{t}

\frac{300,000}{100,000}=\frac{100,000(1.08)^{t}}{100,000}

3=(1.08)^{t}

(1.08)^{t}=3

Let us take natural log on both sides of equation.

\text{ln}((1.08)^{t})=\text{ln}(3)

Using natural log property \text{ln}(a^b)=b\cdot \text{ln}(a), we will get:

t\cdot \text{ln}(1.08)=\text{ln}(3)

\frac{t\cdot \text{ln}(1.08)}{\text{ln}(1.08)}=\frac{\text{ln}(3)}{\text{ln}(1.08)}

t=\frac{1.0986122886681097}{0.0769610411361283}

t=14.274914586

Upon rounding to nearest tenth of year, we will get:

t\approx 14.3

Therefore, it will take approximately 14.3 years until the account holds $300,000.

7 0
3 years ago
What is the value of cos(150°)?
Arte-miy333 [17]
I use a calculator and made sure it was in degrees

5 0
4 years ago
Read 2 more answers
Write a real-world problem to compare fractions.then solve the problem
andrew11 [14]

The fraction computed shows that the total quantity of meat that Joy bought is 5/6kg.

<h3>How to solve the fraction?</h3>

The fraction can be explained thus: Joy bought 1/2kg of meat from a store and bought 1/3kg of meat from store B. What is the total quantity of meat that Joy bought?

The total quantity of meat that Joy bought will be:

= 1/2 + 1/3

= 5/6

In conclusion, the correct option is 5/6kg.

Learn more about fractions on:

brainly.com/question/78672

6 0
3 years ago
In the triangle below, determine the value of a.
dusya [7]

Answer:

6.1

Step-by-step explanation:

Taking cos function,

Cos C=BC/AC

Cos 35°=5/a

a=5/cos 35°

a=6.1

5 0
4 years ago
25,2 x [15+ (8 + 2)]​
barxatty [35]

Answer:

=630

Hope it may help!!

3 0
4 years ago
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