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fenix001 [56]
3 years ago
12

What was the initial quantity of vanadium-49, which has a half-life of 330 days, if after 540 days there is a 1,750 g sample rem

aining?a.)5,440.42g b.)3,500g C.) 8,700g d.)2,863.63g e.)98g
Mathematics
1 answer:
Marizza181 [45]3 years ago
5 0

Answer:

  (a)  5440.42 g

Step-by-step explanation:

The amount remaining (Q) is given in terms of the initial amount (Q₀) by the exponential decay formula ...

  Q = Q₀(1/2)^(t/330) . . . . . where t is in days

__

The amount after 540 days is ...

  1750 g = Q₀(1/2)^(540/330) = 0.321666Q₀

  Q₀ = (1750 g)/(0.321666) ≈ 5440.42 g

The initial quantity was about 5440.42 grams.

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Three friends all live
Margaret [11]

Answer:

Carl lives seven blocks away from Ann

Step-by-step explanation:

You start at Ann's house ( 0 ) 0+5+2=7

Beth is five blocks from Ann ( 5 )

Carl lives two blocks from Beth ( 2 )

5 0
3 years ago
Count the units from (2,4) to (-2,-6).How many blocks are between Jenna’s apartment and Zac’s house
Mashutka [201]

Answer:

Distance = 10.77 unit (Approx.

Step-by-step explanation:

Given:

Coordinate of Jenna's house = (2,4)

Coordinate of Zac's house = (-2,-6)

Find:

Distance

Computation:

Distance = √(X1 - X2)² + (Y1 - Y2)²

Distance = √(2 + 2)² + (4 + 6)²

Distance = √(2 + 2)² + (10)²

Distance = √16 + 100

Distance = √116

Distance = 10.77 unit (Approx.

6 0
3 years ago
Hello! I really don't understand this question. Please answer it, it is due tomorrow! Also, please answer it in the most simple
borishaifa [10]

Answer:

Just because Michelle checked out 20% of her borrowed books were fictions does not mean Michael had more books. For example, Michelle could have borrowed 100 books, which would result into her borrowing 20 fiction books while Michael could have borrowed just 1 fiction book with a 100% of his borrowed books being a fiction book.

Step-by-step explanation:

Just because Michelle checked out 20% of her borrowed books were fictions does not mean Michael had more books. For example, Michelle could have borrowed 100 books, which would result into her borrowing 20 fiction books while Michael could have borrowed just 1 fiction book with a 100% of his borrowed books being a fiction book.

In other words, percentage is just the simplied ratio of something. Percentage cannot account for the original value and its original value cannot be assumed that it is small just because the percentage is small.

6 0
3 years ago
I need help anyone know the answers to this
dedylja [7]

Answer:

See below

Step-by-step explanation:

I'm not going to provide answers, but the tips I'll provide to you will help answer all those questions:

Isosceles triangles have two congruent sides along with two congruent angles

Scalene triangles have no congruent sides nor any congruent angles (think "sca"rce for "sca"lene)

Equilateral triangles have all of their sides congruent to each other along with all of their angles congruent to each other (aka. equiangular angles), so think "equal".

Right triangles have one of their angles measure exactly 90 degrees. This is notated with a box/square shape for the angle (think exact for right).

Acute triangles have all of their angles measuring less than 90 degrees (known as acute angles), so think "cute" meaning "tiny".

Obtuse triangles have only one angle greater than 90 degrees (aka. obtuse angle), but the other two are acute, so think of that big O in obtuse.

I hope this helps you answer the questions, and good luck!

4 0
2 years ago
What is the answer for 2x=7
Wittaler [7]

Answer:

x=3.5

the answer is 3.5 because 7 divided by 2 is 3.5

4 0
3 years ago
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