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3 years ago

12

a rare isotope of a nuclear material is very unstable, decaying at a rate of 14% each second. Find how much isotope remains 13 s

econds after 7 grams of the isotope is created. The mass of the remaining isotope is approximately _ g

1 answer:

Anna35 [415]3 years ago

8 0

I think you divide 14 by 7

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What is the value of 2×[34−5×(3+1)] ?

spayn [35]

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{28}}}}}$

Step-by-step explanation:

Use BODMAS rule :

Bracket , Of , Division , Multiplication , Addition , Subtraction

$\sf{2 \times [ 34 - 5 \times (3 + 1) ] }$

Add the numbers : 3 and 1

$\dashrightarrow{ \sf{2 \times [ 34 - 5 \times 4 ] }}$

Multiply the numbers : 5 and 4

$\dashrightarrow{ \sf{2 \times [ 34 - 20 \: ] }}$

Subtract 20 from 34

$\dashrightarrow{ \sf{2 \times 14}}$

Multiply the numbers : 2 and 14

$\dashrightarrow{ \sf{28}}$

Hope I helped!

Best regards! :D

4 0

3 years ago

PLZ NEED HELP QUESTION IN THE PICUTRE

notsponge [240]

Answer:

<em>Option B</em>

Step-by-step explanation:

<u>Congruent Triangles</u>

The SAS Similarity Theorem states that if two sides in one triangle are proportional to two sides in another triangle and the included angle in both triangles are congruent, then the two triangles are similar.

The triangles $\Delta LKN\ and\ \Delta KNM$ are congruent if the relation between LK and KN is the same as the relation between KN and MN, that is

$\displaystyle \frac{4}{2}=\frac{2}{MN}$

It means that

MN=1

Option B

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3 years ago

When Sarah passes a ball on a sidewalk to her friend, the ball bounces off at the same angle that it was thrown. Use the figure

densk [106]

a. 40 if you dont believe me just look at a 40 degree triangle then the pic

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2 years ago

The product of a number and -3 increased by 8 is no less than 35

Tems11 [23]

-3x + is greater than or equal to 35

hope this helps!

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2 years ago

100 IF U GET THIS RIGHT!

Mkey [24]

3/7 because that is the number being added to the zero in the equation

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2 years ago

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