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Mathematics

1 answer:

ycow [4]1 year ago

8 0

Answer:

I think it's the 3rd or fourth one. I'm not positive tho

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Find the amount of change and the percent of decrease in the number of Hurricanes from 2008 to 2009 and from 2010 to 2011. Compa

AlekseyPX

Well, in the chart for 2008 it has 8 hurricanes, in 2009 it has based on that bar, 3 hurricanes, the change is then 5, 8 - 3 = 5.

now if we take 8 to be the 100%, what is 5 off of it in percentage?

$\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
8&100\\ 5&p
\end{array}\implies \cfrac{8}{5}=\cfrac{100}{p}\implies p=\cfrac{5\cdot 100}{8}\implies p = 62.5$

now in 2010, there were 12 hurricanes, whilst looking at the bar, in 2011 there were only 7, so that's a change of 5.

if we take 12 to be the 100%, what is 5 off of it in percentage?

$\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
12&100\\
5&p
\end{array}\implies \cfrac{12}{5}=\cfrac{100}{p}\implies p=\cfrac{5\cdot 100}{12}\implies p\approx 41.67$

5 0

2 years ago

You open a savings account with a deposit of $1,963. The account as an annual interest rate of

Roman55 [17]

Answer: $184,514.91

Time would be 38 years.

3 0

1 year ago

Evaluate the following expression. −8 × (−10) −7× 1/−1

GaryK [48]

Answer:

Step-by-step explanation:

$-8\left(-10\right)-7 \times \frac{1}{-1}=87\\\\\mathrm{Apply\:rule}\:-\left(-a\right)=a\\\\=8\times \:10-7\times \frac{1}{-1}\\\\8\times \:10=80\\\\7\times \frac{1}{-1}=-7\\\\=80-\left(-7\right)\\\\\mathrm{Apply\:rule}\:-\left(-a\right)=a\\\\=80+7\\\\=87$