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3 years ago

Which difference is greater?

Mathematics

2 answers:

Andreas93 [3]3 years ago

3 0

7.3Answer:

Step-by-step explanation:that looks the highest

Luden [163]3 years ago

3 0

B is the correct answer bc it has the highest left

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15% tip on a $38 bill

Vanyuwa [196]

ANSWER:
your tip would be $5.70

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3 years ago

What is 1 2/5x =7 because i really need help<br><br>

astraxan [27]

(1 2/5)(x)=7

Simplify both sides of the equation.

7/5x=7

Multiply both sides by 5/7.

(5/7)*(7/5x)=(5/7)*(7)

x=5

3 0

3 years ago

How many half-lives of radon-222 have passed in 11.46 days? If 5.2 × 10−8 g of radon-222 remain in a sealed box after 11.46 days

Svetach [21]

Answer:

(i) Approximately 3 half lifes

(ii) $4.21\times 10^{-7}\text{ g}$

Step-by-step explanation:

(i) ∵ The half life of Radon-222 is approximately 3.8 days,

So, the number of half life in 11.46 days = $\frac{11.46}{3.8}$ ≈ 3

(ii) Since, the half life formula is,

$N=N_0 (\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}$

Where,

$N_0$ = initial quantity,

t = number of periods

$t_{\frac{1}{2}}$ = half life of the quantity,

Given,

N = $5.2\times 10^{-8}\text{ g}$

t = 11.46 days,

$t_{\frac{1}{2}} = 3.8\text{ days}$

$\implies 5.2\times 10^{-8}=N_0 (\frac{1}{2})^\frac{11.46}{3.8}$

$\implies N_0=2^{\frac{11.46}{3.8}}\times 5.2\times 10^{-8}\approx 4.21\times 10^{-7}\text{ g}$

7 0

4 years ago

#81 please!!!!!! I’ll rate you!

natta225 [31]

The circumference of a circle with radius $r$ is

$C=2\pi r$

So, one quarter of a circumference will be

$\dfrac{C}{4}=\dfrac{\pi r}{2}$

You radius is 6, so we have

$\dfrac{C}{4}=\dfrac{6\pi}{2}=3\pi \approx 9.42$

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4 years ago

Please help me, i am on the test rn

VikaD [51]

Answer:

20 weeks in 1 week

in 2 weeks 40

Step-by-step explanation:

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3 years ago