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3 years ago

Consider the enlargement of the triangle.

Mathematics

2 answers:

Alina [70]3 years ago

7 0

Answer:

Kyla multiplied the corresponding sides by 2 instead of dividing to find the original.

Step-by-step explanation:

creativ13 [48]3 years ago

7 0

Answer:

Kyla multiplied the corresponding sides by 2 instead of dividing to find the original. just did it

Step-by-step explanation:

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A home file is the place where you should keep financial records that you may need to access regularly? True or False

alex41 [277]

True! we have an excel file called moneydoc.xls

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3 years ago

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Someone help and please make sure the answer is right! :)

TEA [102]

Answer:

Step-by-step explanation:

180-51-45=84

I think this would be the answer since triangles add up to be 84 and we are just finding the last missing angle.

hope this helps :)

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3 years ago

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Thorium -228 is a radioactive substance that decays 50% every 1.9 years. How much of a 50 gram sample will exist after 22.8 year

Evgesh-ka [11]

Answer:

$A=0.0122\ gr$

Step-by-step explanation:

The exponential decrease formula that we must use is:

$A=A_0e^ {-kt}$

Where A is the amount of thorium as a function of time

$A_0$ is the initial amount and k is the decrease rate

We know that initially there are 50 gr and that you decay 50% every 1.9 years.

$A=A_0*0.5=50*0.5 = 25\\\\t=1.9$

$25=50e^ {-k(1.9)}$

We solve the equation for k

$0.5=e^ {-k(1.9)}$

$ln(0.5)=ln(e^ {-k(1.9)})$

$ln(0.5)=-k(1.9)$

$-1.9k=ln(0.5)$

$k=-\frac{ln(0.5)}{1.9}\\\\k=0.3648$

After 22.8 years the amount of thorium that exists is:

$A=50e^ {-0.3648(22.8)}$

$A=0.0122\ gr$

5 0

4 years ago

clara is playing a game where you score -8 points each time you guess the correct answer. the goal is to get the lowest score. t

Lina20 [59]

Answer:

272

Step-by-step explanation:

-8--280=272

7 0

3 years ago

Mrs. Fisher worked her 40 regular hours last week, plus 4 overtime hours at the double-time rate. Her gross pay was $576. What w

marysya [2.9K]

Answer: $12.

Step-by-step explanation:

4 overtime hours at the double-time rate =

4*2=8 regular hours.

Hence,

Mrs. Fisher worked her 40+8 regular hours last week.

Mrs. Fisher worked her 48 regular hours last week.

Her gross pay was $576.

So,

$576:48=

$12.

4 0

2 years ago