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german
3 years ago
5

A roll of ribbon was 9 meters long. Kevin cut 8 pieces of ribbon each of length 0.8 meter, to tie some presents. He then cut the

remaining ribbon into some pieces, each of length 0.4 meter.
a) how many pieces of ribbon, each 0.4 meter in length, did Kevin have?
b) What was the length of ribbon left over?
Mathematics
1 answer:
NikAS [45]3 years ago
8 0
He has six pieces ribbon and one little piece that is 0.2 meters long
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2. Margie Spencer wants to have $100,000 in her savings account in 20 years. If her account pays 6.6% annual
WITCHER [35]

~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\dotfill & \$100000\\ P=\textit{original amount deposited}\\ r=rate\to 6.6\%\to \frac{6.6}{100}\dotfill &0.066\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{semiannually, thus two} \end{array}\dotfill &2\\ t=years\dotfill &20 \end{cases}

100000=P\left(1+\frac{0.066}{2}\right)^{2\cdot 20}\implies 100000=P(1.033)^{40} \\\\\\ \cfrac{100000}{1.033^{40}}=P\implies 27288.97\approx P

7 0
2 years ago
I need a lot of help, please! ):
tankabanditka [31]

Answer:

I don't know sorry it even very hard and diffult for a high school kid

8 0
3 years ago
HELP ASAP....1-4 please use the chart for help on the right side
Kazeer [188]

#2   8/20=12/x  Cross multiply  8x=20×12  8x=240  Now divide   X = 240÷8  X=30   So 30 ft

8 0
3 years ago
Divide √9x2 by √18y2
Murrr4er [49]

The answer is x√2/2y

Hope this helps! :)


3 0
4 years ago
????????????????????????????????????????????????????????????
Nuetrik [128]

Answer:

r=20

Step-by-step explanation:

to get rid of the division part, you multiply 6 each side. now you have r+10=30. to solve, now you subtract 10 from both sides. this gives you r=20 :)

8 0
3 years ago
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