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Triss [41]
3 years ago
7

Can someone pls help me out on the middle one pls ?:(

Mathematics
1 answer:
Sauron [17]3 years ago
5 0

Answer:

77 C

Step-by-step explanation:

To find the mean add all the numbers together then divide by the total amount of numbers

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Work out the area of a parallelogram of base 6cm and height 8cm
trapecia [35]
The formula to find the area of a parallelogram is: A=bh (b standing for your base, and h for height) You substitute 6 and 8 into your formula and your answer is 48cm^{2}
7 0
3 years ago
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Situation:
FromTheMoon [43]

Answer:

5.6 days

Step-by-step explanation:

We are given;

Initial Mass; N_o = 25 g

Mass at time(t); N_t = 25/2 = 12.5 (I divide by 2 because we are dealing with half life)

k = 0.1229

Formula is given as;

N_t = N_o•e^(-kt)

Plugging in the relevant values;

12.5 = 25 × e^(-0.1229t)

e^(-0.1229t) = 12.5/25

e^(-0.1229t) = 0.5

(-0.1229t) = In 0.5

-0.1229t = -0.6931

t = -0.6931/-0.1229

t = 5.6 days

4 0
2 years ago
Adding school fairest 20% of the people are under 16 years old one third of the people remaining are teachers if there are 21 te
dedylja [7]
<span>In the fairest school 20% are below 16 years old
1/3 are teachers which is equals to = 21
Let’s start solving:
=> 1/3 of 100% = ( 100 / 3 = 33.33% )
thus 33.33% = 21
=> 21 x 3 = 63, is the total number of people in the school.
Let’s try solving the number of people below 16 years old
Then there are 20% of it:
=> 63 * .20 = 12.6
Thus, there are around 13 people who are 16 years old younger.</span>



4 0
3 years ago
Moe is 12 years older than Barney .three years ago ,moe was five times as old as Barney .how old is Barney now
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The answer is 7 years old.
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2 years ago
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cube A has volume V. the edges of cube b are three times as long as the edges of cube A. What is the volume of cube b in terms o
Mariulka [41]

Answer:

V=a cube

If i am wrong let me know!

4 0
2 years ago
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