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4 years ago

What is 8×5 and 5×8 cause they said 20

Mathematics

2 answers:

11111nata11111 [884]4 years ago

6 0

It is 40 because 8*5 is 40

krok68 [10]4 years ago

5 0

Both of these products would be 40.

The order of the multiples does not change the answer.

(Communtative Property of Multiplication)

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Which statement is true about the graphs of the two lines y = –6 and x = 1/6 ?

sineoko [7]

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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,

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

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

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

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4 years ago

Solve the inequality 5p -3 < 7 + 3p for p

KiRa [710]

Step-by-step explanation:

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3 years ago

Equations for m equals three times n devided by the difference of 4p and 5 n

MrRa [10]

Numerator of the equation is 3*nDenominator is 4*p - 5*n The equation is m = 3n/(4p-5n)

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Denominator = 4*p - 5*n
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4 years ago

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myrzilka [38]

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3 years ago