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Amiraneli [1.4K]
3 years ago
6

Trignometry help what's the answer?

Mathematics
1 answer:
butalik [34]3 years ago
7 0
You have the 175 on the wrong line, the problem says 175 feet from the base, this is the bottom of the tree.

 See attached picture for solution:

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kobusy [5.1K]
You are multiplying the 3x by 6 
the last choice is correct
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Please help ill mark you brainliest!​
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3 years ago
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 <u>after</u><u> </u><u>4</u><u>2</u><u>0</u><u> </u><u>days</u><u> </u>

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.
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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

4 0
3 years ago
BRAINLIESTTT<br><br> What is the square root of 5?
butalik [34]

Answer:

2.2360679775

that's what I counted and got yep u know I was wrong.

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2 years ago
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What does the equation y = -x mean
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It means the variable y is equal to the negative variable of x.

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