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3 years ago

Do this pls 35 points

Mathematics

1 answer:

love history [14]3 years ago

7 0

Answer:

x = 68

Step-by-step explanation:

If you look at the triangle properly, it is a isosceles triangle where two legs are equal to each other.

The answer for x will be:

56 + 56 + x =180

112 + x = 180

x = 68

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How many times does 18 go into 756?

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42 Times.
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3 years ago

Element X decays radioactively with a half life of 15 minutes. If there are 960 grams of Element X, how long, to the nearest ten

labwork [276]

An equation is formed of two equal expressions. It will take for the radioactive element to decay from 960 grams to 295 grams in 25.54 minutes.

<h3>What is an equation?</h3>

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

The radioactive decay of an element is given by the formula,

$N = N_0 \cdot e^{-\lambda t}$

Given the half-life of the element is 15 minutes, therefore, we can write,

$\dfrac12 = e^{-\lambda\times 15}\\\\\ln (0.5) = -\lambda\times 15\\\\\lambda = 0.0462$

Now, the time it will take for 960 grams to decay to 295 grams is,

$295 = 960 \cdot e^{-0.0462 \times t}\\\\\ln (\dfrac{295}{960}) = -0.0462 \times t\\\\t = 25.54\rm\ minutes$

Hence, it will take for the radioactive element to decay from 960 grams to 295 grams in 25.54 minutes.

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1 year ago

[please help me im stuck

Nina [5.8K]

Answers:

9: D. 11.5m^3

10: A. 0.5m^3

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2 years ago

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3 years ago

The sum of 3 consecutive even numbers is 132<br><br>pleaase help!!!

agasfer [191]

Answer:

42,44,46

Step-by-step explanation:

we first divide the 132 by the 3 which gives 44

since the numbers involved are even numbers and we know even numbers are numbers divisible by 2 we subtract 2 from the 44 and also add 2 to the 44 the get the rest of the two numbers which is from the above explanation

(44-2),44,(44+2)

42,44,46

we can check whether the above numbers are correct by adding to see whether we get 132

42+44+46=132 which are consecutive even numbers

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3 years ago

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