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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)

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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A theater has 1200 seats. each row has 20 seats. write and solve an equation to find the number xx of rows in the theater. an eq

hammer [34]

The equation is 20x = 1200
x=1200÷20
x=60 rows

5 0

3 years ago

Can someone gimme the answer please

makvit [3.9K]

Answer:

g(x) = 1/4 f(x)

Step-by-step explanation:

(x,y) -> (x , 1/4 y) .. vertical compression

5 0

3 years ago

Determine the factors of 3x2 + 10x − 8. (Which is the right answer?)

VMariaS [17]

ANSWER

$(3x - 2)(x + 4)$

EXPLANATION

The given quadratic trinomial is

$3 {x}^{2} + 10x - 8$

Comparing to the general quadratic trinomial:

$a{x}^{2} + bx + c$

We have a=1, b=10 and c=-8

$ac = 3 \times - 8 = - 24$

The factors of -24 that adds up to 10 are -2 and 12.

We split the middle term to obtain;

$3 {x}^{2} + 12x - 2x- 8$

Factor;

$3x(x+ 4) - 2(x + 4)$

Factor further;

$(3x - 2)(x + 4)$

The last option is correct.

4 0

3 years ago

Answer this please!

Troyanec [42]

f(x) = 4x + 3

That's one-to-one, a linear function that will give a different f(x) for each different x.

For the inverse let's swap x and y and solve for y

x = 4y + 3

x - 3 = 4y

y = (x- 3)/4

That's the inverse,

Answer: (x- 3)/4, second choice

The domain and range of the inverse is all real numbers. It's two lines; I'll leave the graphing to you.

8 0

4 years ago

in a typical bag of skittles, the ratio of red to yellow skittles is 3 to 7. If there are 40 skittles altogether, how many red s

irina [24]

Answer:

I love Skittles

what's your favorite color?

4 0

3 years ago