2 years ago

What is 9,800,000,000,100 in scientific notation?

Mathematics

2 answers:

ElenaW [278]2 years ago

8 0

9 trillion, 800 billion,100

guajiro [1.7K]2 years ago

7 0

9.8000000001 x 10^12

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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]

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

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

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2 years ago

A road repair crew spread 7/8 of a ton of gravel evenly over 7 feet of road. How many tons of gravel did they spread on each foo

Alex

7/8 duh it there u just have to read it nicely

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2 years ago

For which values of P and Q does the following equation have infinitely many solutions ?

solmaris [256]

Answer:

(P, Q) = (-75, 57)

Step-by-step explanation:

The equation will have infinitely many solutions when it is a tautology.

Subtract the right side from the equation:

Px +57 -(-75x +Q) = 0

x(P+75) +(57 -Q) = 0

This will be a tautology (0=0) when ...

P+75 = 0

P = -75

and

57-Q = 0

57 = Q

_____

These values in the original equation make it ...

-75x +57 = -75x +57 . . . . . a tautology, always true

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2 years ago

A racing car used 255 litres of fuel to complete a 340 km race. How many litres of fuel did the car use every 100km?

natka813 [3]

340 = 255
100 = ?

100 times 255 = 25500
25500 divided by 340 is 75
75 ltrs

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2 years ago

Read 2 more answers

Write an expression that I’d equivalent to 1/2a - 4. URGENT, LIMITED TIME.

SCORPION-xisa [38]

Answer:

1/2(a-4)

Step-by-step explanation:

first blank is 1/2 and second is 4.

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2 years ago