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3 years ago

Add using scientific notation. (5.2 x 10') + (3.01 x 10^)

Mathematics

1 answer:

satela [25.4K]3 years ago

7 0

Answer: What's the exponents?

Step-by-step explanation:

5.2+3.01=8.21

but then there's no exponents that you stated. So it would be 8.21x10^?

If the tens do have exponents above them, add them together.

I hope this answer helps you!

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A sum of money is invested at 12% compounded quarterly. About how long will it take for the amount of money to double?

kompoz [17]

Answer:

5.9 years

Step-by-step explanation:

We believe a better representation of the compound interest formula is ...

$V(t)=P(1+\dfrac{r}{n})^{nt}$

We want to find the value of t for P=1 and V(t)=2. We are told n=4, so the formula becomes ...

$2=(1+\dfrac{.12}{4})^{4t}\\\\\log{(2)}=4t\log{(1.03)}\quad\text{take logs}\\\\t=\dfrac{\log{2}}{4\log{1.03}}\approx\boxed{5.9\quad\text{years}}$

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3 years ago

7.) Nate has $267 in bills. None of the bills is greater than $10. He has eleven $10 bills. He has seven fewer $5 bills than $1

slavikrds [6]

Just set up 2 equations.

267 = 10(11) + 5(x) + 1(y)
x = y - 7

you can plug the second into the first and get

267 = 110 + 5(y - 7) + y
157 = 5y - 35 + y
6y = 192
y = 32
x = 32 - 7 = 25

thus, 32 $1's and 25 $5's

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3 years ago

1/5x + 1/4 = 1/2(x+5) Answer Plz I Need It!

pav-90 [236]

Answer:

x=-15/2

Step-by-step explanation:

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3 years ago

Solve for x. X/5-7=4

hjlf

Answer:

x = 55

Step-by-step explanation:

$\frac{x}{5} - 7 = 4 \\ = > \frac{x}{5} = 4 + 7 \\ = > \frac{x}{5} = 11 \\ = > x = 11 \times 5 \\ = > x = 55$

Hope it helps.

Don't forget to click the Brainliest button if you like my answer.

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2 years ago

`9` is `50\%` of what number?

sweet [91]

Answer:

Step-by-step explanation:

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3 years ago