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Alexandra [31]
3 years ago
14

28 is 7 times what number? please help its for 6th graed

Mathematics
1 answer:
Molodets [167]3 years ago
4 0
The answer is 4. 7 x 4 = 28
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alexandr402 [8]
Use of distributive property will be
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Element X decays radioactively with a half life of 14 minutes. If there are 760 grams of Element X, how long, to the nearest ten
Mkey [24]

Answer:

85.5 minutes

Step-by-step explanation:

The amount of an element that will remain after time t can be expressed as a function of initial amount N0, time t, and half life th as;

Nt = N0 × e^(-λt)

Where;

Decay constant λ = ln(2)/th, substituting into the equation;

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We need to make t the subject of formula;

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Given;

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t = ln(Nt/N0) ÷ -ln(2)/th

Substituting the given values;

t = ln(11/760) ÷ -ln(2)/14

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4 0
3 years ago
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daser333 [38]

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7 0
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Step-by-step explanation:

hope it helps!

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3 years ago
-2 (x+5):4<br> Pliss es para hoy
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