3 years ago

77672÷5548answer showing work

Mathematics

1 answer:

stiks02 [169]3 years ago

7 0

14 is that answer but I am not sure how to show my work on here

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Find n. Use the pictures for more info

SSSSS [86.1K]

9514 1404 393

Answer:

A. 5

Step-by-step explanation:

The base AB is twice the length of the midsegment CD.

8n +10 = 2(5n)

8n +10 = 10n . . . . . eliminate parentheses

10 = 2n . . . . . . . . . subtract 8n

n = 5 . . . . . . . . . . . divide by 2

8 0

3 years ago

A sample of tritium-3 decayed to 94.5% of its original amount after a year.

Zolol [24]

(a) If $y(t)$ is the mass after $t$ days and $y(0) = A$ then $y(t) = Ae^{kt}.$

$y(1) = Ae^k = 0.945A \implies e^k = 0.945 \implies k = \ln 0.945$

$\text{Then } Ae^{(\ln 0.945)t} = \frac{1}{2}A\ \Leftrightarrow\ \ln e^{(\ln 0.945)t} = \ln \frac{1}{2}\ \Leftrightarrow\ ( \ln 0.945) t = \ln \frac{1}{2} \Leftrightarrow \\ \\
t = - \frac{\ln 5}{\ln 0.945} \approx 12.25 \text{ years}$

(b)
$Ae^{(\ln 0.945) t} = 0.20 A \ \Leftrightarrow\ (\ln 0.945) t \ln \frac{1}{5}\ \implies \\ \\
t = - \frac{\ln 5}{\ln 0.945} \approx 28.45\text{ years}$

3 0

4 years ago

5. Vena finds lost balls and sells them. After selling 13, she had 22 balls left. How many golf balls did Vena have

Olenka [21]

Answer:35

Step-by-step explanation:

22+13=35

5 0

4 years ago

The perimeter of a rectangle is 28 cm and<br>its length is 8 cm. Find its breadth.

Yakvenalex [24]

Answer:
The width of the rectangle is 6cm.

Explanation:
Perimeter=2(length+width)
28=2(8+w)
Distribute 2 into the parentheses
28=16+2w
Combine like terms
28-16=2w
12=2w
Divide both sides by 2
6=w

I hope this helps! Please comment if you have any questions.

7 0

4 years ago

9. Write the missing addend. 46 + = 52

Alex73 [517]

Answer:

Step-by-step explanation:

To find the missing number, subtract: 52 - 46 = 6

3 0

3 years ago

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