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3 years ago

Select all that apply.

Mathematics

1 answer:

Nina [5.8K]3 years ago

3 0

Step-by-step explanation:

In parallelogram Both pairs of opposite sides are parallel

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Half-life of Po-210 is 140 days. If the initial mass of the sample is 5

Anna35 [415]

Answer:

$0.625kg$

Step-by-step explanation:

we are given half-life of PO-210 and the initial mass

we want to figure out the remaining mass after 420 days

in order to solve so we can consider the half-life formula given by

$\displaystyle f(t) = a {0.5}^{t/T}$

where:

f(t) is the remaining quantity of a substance after time t has elapsed.
a is the initial quantity of this substance.
T is the half-life

since it halves every 140 days our T is 140 and t is 420. as the initial mass of the sample is 5 our a is 5

thus substitute:

$\displaystyle f(420)=5\cdot{0.5}^{420/140}$

reduce fraction:

$\displaystyle f(420)=5\cdot{0.5}^{3}$

By using calculator we acquire:

$\displaystyle f(420)=0.625$

hence, the remaining sample after 420 days is 0.625 kg

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3 years ago

Hurry please! answer for brainly.

vodka [1.7K]

Answer:

Is there answer choices?

Step-by-step explanation:

Not very clear, could be any number of things. If there are words to choose from i can help you.

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3 years ago

How would you solve 35 divied by 4.293

Goshia [24]

Answer:

calculater

Step-by-step explanation:

thats it basicLlg

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3 years ago

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Given that y varies directly with x and y = 42 when x = 14, find y when x =90.

Anvisha [2.4K]

Direct Variation equation: y=kx, k=y/x
42/14=3
k=3
y=3x
y=3(90)
y=270

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3 years ago

Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).

sineoko [7]

Answer:

The value of x =2 and y= 2, because they are congruent and 2+2=4

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2 years ago

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