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True [87]
2 years ago
10

Please help im 25% blind

Mathematics
1 answer:
FrozenT [24]2 years ago
5 0

Answer:

c

Step-by-step explanation: all you have to do is work it out

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If 96 grams of carbon-14 are originally present in a fossilized plant at the present time, how much will remain after 17,000 yea
Elden [556K]
Well, you already have the decay model, so just plug that in

\bf A=96e^{-0.000121\cdot 17000}\implies A=96e^{-2.057}
5 0
2 years ago
Solve the system of equations using substitution -3x + 2y = 12 x = 2y - 8
SCORPION-xisa [38]

Answer:

(-2, 3)

Step-by-step explanation:

Given the system of equations:

-3x + 2y = 12

x = 2y - 8

You can 'substitute' the expression '2y - 8' for the value of 'x' in the first equation and solve for 'y':

-3(2y - 8) + 2y = 12

Distribute: -6y + 24 + 2y = 12

Combine like terms: -4y + 24 = 12

Subtract 24 from both sides: -4y + 24 - 24 = 12 - 24 or -4y = -12

Divide both sides by -4: -4y/-4 = -12/-4  or y = 3

Use y = 3 to solve for 'x':

x = 2(3) - 8 or 6 - 8

x = -2

(-2, 3)

5 0
3 years ago
What are the domain and range of each relation? Drag the answer into the box to match each relation. A mapping diagram. Element
ra1l [238]

Answer:

Domain: {−2, −1, 0, 2} Range: {−4, −2, 2}

Step-by-step explanation:

We have been given a mapping diagram as shown below:

X Y

-2 -4

-1 -2

0 2

2


For better view, you can check the attached mapping diagram.

From that diagram we have to find domain and range.

Domain contains only x values so domain will be:

Domain: {-2,-1,0,2}

Range contains only y values so range will be:

Range: {-4,-2,2}

We see that only third choice matches obtained values of domain and range.

Hence final answer is  Domain: {−2, −1, 0, 2} Range: {−4, −2, 2}

7 0
3 years ago
You design a new app for cell phones. Your revenue for x downloads is given by f(x) = 3x Your profit
Snowcat [4.5K]

Answer:

p = 2.7x - 20

p(90) = $223

Step-by-step explanation:

revenue → f(x) = 3x  ,where x is the number of downloads.

the statement “Your profit p is $20 less than 90% of the revenue for x downloads”

<u><em>means</em></u>

p=90\% f\left( x\right)  -20

<u><em>means</em></u>

<u><em></em></u>p=\frac{90}{100} \times f\left( x\right)  -20

<u><em>means</em></u>

p=\frac{9}{10} \times (3x)  -20

<u><em>means</em></u>

p=\frac{9}{10} \times (3x)  -20

<u><em>means</em></u>

p=2.7x -20

………………………………

the profit for 90 downloads :

= p(90)

= 2.7×(90) - 20

= $223

5 0
2 years ago
What is the consecutve whole numbers of <img src="https://tex.z-dn.net/?f=%5Csqrt%7B40" id="TexFormula1" title="\sqrt{40" alt="\
Inessa [10]

Step-by-step explanation:

\sqrt{36}  <   \sqrt{40}  <   \sqrt{49}

So sqrt(40) lies between 6 and 7.

3 0
2 years ago
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