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antiseptic1488 [7]
3 years ago
9

The radioisotope Mo-91 has a t1/2 of 15.5min. A sample decays at the rate of 954counts/min (954cpm). After how many minutes will

the decay be at 7.45cpm? (Step by step please)
Mathematics
1 answer:
TiliK225 [7]3 years ago
5 0

Step-by-step explanation:

Transcribed image text: Spectra Analysis 7 100 80 60 40 20 150 50 STRUCTURE 60 40 20 0 180 160 140 120 100 8O

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It’s asking for the area<br> Please help me! Thank you!
Sliva [168]
<h3>Answer:   x^2+9x+8</h3>

==============================================================

Explanation:

With many math problems, a good strategy is to break things down into smaller pieces. In this case, we need to find the area of each individual smaller rectangle

A = blue rectangle area = length*width = x*x = x^2

B = purple rectangle area = length*width = x*1 = x

C = green rectangle area = length*width = 8*x = 8x

D = orange rectangle area = length*width = 1*8 = 8

Add up A through D to get the overall area of the entire or largest rectangle possible

total area = A+B+C+D = x^2+x+8x+8 = x^2+9x+8

notice how x+8x turns into 9x. You can think of it as 1x+8x = (1+8)x = 9x

This is because x and 8x are like terms which can be combined. Everything else is left as is.

Because we don't know what number goes in place for x, we cannot simplify or evaluate x^2+9x+8 any further.

4 0
4 years ago
Write the equation of the line in slope-intercept form with slope = 1/4 and point (-8, 6)
Lera25 [3.4K]

Step-by-step explanation:

This is the standard linear equation:

y=mx+b

m represents slope and b represents the y-intercept. In a finished equation, x and y are left as variables. x and y represent any given point in the function. In this case, one of the given coordinates is (-8, 6), and we can use this by using -8 as x and 6 as y. After plugging in known variable, the equation becomes this:

6 =  \frac{1}{4} ( - 8) + b

This simplifies to:

6 =  - 2 + b

Then to:

4=b.

After plugging in slope and y-intercept, the finished equation is:

y =  \frac{1}{4} x + 4

5 0
3 years ago
Pls help! I am really stuck.<br> Find the domain of this graph.
Rudik [331]

Answer:

8

Step-by-step explanation:

The domain is from the points (-4,0) through (4,0).

6 0
3 years ago
Read 2 more answers
Simplify as a ratio: 100:199:47
rodikova [14]

Answer:

Find GCF of all values in the given ratio

GCF(100, 199, 47) = 1

When GCF value is equal to 1, the given ratio can not be simplified.

Step-by-step explanation:

It cant be simplified

3 0
3 years ago
Read 2 more answers
Please help will mark brainliest
atroni [7]
1,4,5,8

Hope this helps! <3

(Im so sorry if its wrong i havent done these in a while but in 99% sure)
7 0
4 years ago
Read 2 more answers
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