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spayn [35]
3 years ago
6

How do you find the total surface area of a 3-D composite figure? Do you subtract one base from one of the figures or both of it

s bases?

Mathematics
1 answer:
Andrews [41]3 years ago
6 0
What does the shape look like?
Ok, so say you are calculating the surface area of the shape in the image below.
You would calculate the area of both shapes (the vertical box and the horizontal one), then subtract the area of the left face of the left rectangle (it is 10x20). That way, you are subtracting the area from the tall box. Make sure when you calculate the area of the short box that you don't include the left face (which is non-existent because it is attached to the tall box). If this is still really confusing (don't blame you if it is!!), let me know and I will walk through and example with you. Hope this helps!!

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Cynthia invests some money in a bank which pays 5% compound interest per year. She wants it to be worth over £8000 at the end of
Agata [3.3K]

\bf \qquad \textit{Compound Interest Earned Amount}\\\\A=P\left(1+\frac{r}{n}\right)^{nt}\quad \begin{cases}A=\textit{accumulated amount}\to &8000\\P=\textit{original amount deposited}\\r=rate\to 5\%\to \frac{5}{100}\to &0.05\\n=\begin{array}{llll}\textit{times it compounds per year}\\\textit{is only once, so}\end{array}\to &1\\t=years\to &3\end{cases}

\bf 8000=P\left(1+\frac{0.05}{1}\right)^{1\cdot 3}\implies 8000=P(1.05)^3\implies \cfrac{8000}{1.05^3}=P\\\\\\6910.70\approx P\implies  \stackrel{\textit{rounded up}}{6911 = P}\qquad  therefore\qquad 6911~~\leqslant ~~P

6 0
3 years ago
What is the whole number 11 minus the number 3 4/12 show your work
olga2289 [7]

1.) 11 - 3 4/12

2.) 11 - 3 1/3    

3.) 11/1  - 3 1/3

4.) 33/3 -  10/3  

5.) 23/3 or 7.7 or 7 2/3 is your answer, depending on how you want it

7 0
3 years ago
Read 2 more answers
What are the equivalent fractions for 2 1/5 and 1 5/6 using 30 as the common denominator
Anuta_ua [19.1K]

Answer:

2 6/30 and 1 25/30

Step-by-step explanation:

First, you need to find 30÷5 and 30÷6. You do this because you need to know the multiplier when you create an equivalent fraction. 30÷5 is 6 and 30÷6 is 5. 2 1/5. You need to multiply the 1 and 5 by 6, that is 2 6/30. 1 5/6. 5 and 6 multiplied by 5 is 25 and 30. 1 5/6=1 25/30

4 0
2 years ago
Sandy paid $20.30 as the sales tax for a bike she bought. If the sales tax is
BigorU [14]

Answer:

21.72

Step-by-step explanation:

0.07 x 20.30

4 0
3 years ago
Which of the following is a complex number?
Olin [163]

Answer:

The correct answer is option C , 4 + 9i

Step-by-step explanation:

A complex number is the one which has a real number and an imaginary number.

In all the example given , option C 4 + 9i has "i" which signifies the imaginary number which nothing but a negative square root.


3 0
3 years ago
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