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3 years ago

Please I really need an A on this I will let you know the answers when Im done

Mathematics

1 answer:

zhenek [66]3 years ago

5 0

1 . 48 is the answer as the two bottom ones are equal 180-66-66=48

2. 117 degrees as the angle is the same as the other congruent angle shown in the diagram

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Describe the image of a dilation with a scale factor of 1

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<span>With a scale factor of 1, the image is exactly the same size as the original object.</span>

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4 years ago

There are 948 students in a school. The headteacher wants to know if the students would prefer to

Anastasy [175]

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2 years ago

(PLZ help)

k0ka [10]

2.because
5.50x4=22
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3 years ago

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Find the value of x in the isosceles triangle shown below.

alisha [4.7K]

Answer:

so the answer is B

Step-by-step explanation:

5 squared = 6 squared + x squared

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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.

Learn more about Equation:

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2 years ago