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3 years ago

Fine the average of these numbers, 8,12,13,15

Mathematics

2 answers:

GarryVolchara [31]3 years ago

8 0

Answer:

Step-by-step explanation:

The average is calculated as

average = $\frac{sum}{count}$ = $\frac{8+12+13+15}{4}$ = $\frac{48}{4}$ = 12

V125BC [204]3 years ago

6 0

Answer:

The average is 12

Step-by-step explanation:

When finding the average of a group of numbers, all you have to do is add all the numbers together and divide by the amount of numbers that you added by. 8 + 12 + 13 + 15 = 48. 48 ÷ 4 = 12

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Naddika [18.5K]

Answer:

Answered

Step-by-step explanation:

Total amount of paint = 14 gallons

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3 years ago

The half-life of lead is 22 years. How long will it take for a sample of this substance t decay to 80% of its original amount?

Svetlanka [38]

Answer: 7 years

Step-by-step explanation:

$t_{\frac{1}{2} }$ = In2 / ∧

since the half life is given , we have :

22 = In 2/ ∧

∧ = In2/22

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Recall the formula for half life:

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Therefore:

0.80 = $e^{-0.032t}$

Take the In of both sides

In 0.80 = - 0.032t

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t = 7 years

4 0

4 years ago

KonstantinChe [14]

The bench costs $450.
You first need to subtract the difference between the garden table and the bench from the total so they are equivalent, and then divide by two to find what the bench is on its own.
(The garden table costs $536, by the way. To find that, you just need to add its half of 900, 450, to the 86 you subtracted initially.)
Tell me if this doesn’t make sense, it’s sort of hard to explain!

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3 years ago

Talia took the bus from her home to the bank and then walked back to her home along the same route. The bus traveled at an avera

Mekhanik [1.2K]

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Step-by-step explanation:

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3 years ago

Which of the following is a solution of y - x < -3?

Mariulka [41]

Answer:

Option A. (6,2)

Step-by-step explanation:

We have the following inequality:

$y- x$