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krek1111 [17]
3 years ago
12

Question: Carbon-11 has a half-life of about 20 minutes. If we start with 200 grams, how

Mathematics
1 answer:
irakobra [83]3 years ago
3 0

Answer:

C). 0.39 grams

Step-by-step explanation:

First find how many half-lifes are in 3 hours:

3 hours ÷ 20 minutes = 9 half-lifes

Find the total left:

0.5^9*200 ≈ 0.39

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Mei puts 600.00 in an account to use for school expenses . The account earns 10% interest , compound quarterly. How much interes
ExtremeBDS [4]
She would have $960.

Hope this helped:D

8 0
3 years ago
The length of one base of a trapezoid is 19 less than five times the length of the other base. If the trapezoid has a height of
ycow [4]

The length of the longer base is 41 ft.

<u><em>Explanation</em></u>

Lets assume, length of one base is x ft.

As, another base is 19 less than five times the length of this base, so the length of another base = (5x- 19) ft.

The trapezoid has a height of 18 ft and area of 477 ft²

Formula for Area of trapezoid, A=\frac{1}{2} (a+b)*h , where a, b = Two bases of trapezoid and h = height of the trapezoid.

Given in the question: A= 477 and h= 18

We have also two bases as: a= x and b= 5x-19

So, according to the above formula...

A= \frac{1}{2}(a+b)h\\\\ 477=\frac{1}{2}(x+5x-19)*18\\\\ 477=9(6x-19)\\\\477= 54x-171\\\\477+171=54x\\\\648=54x\\\\x=\frac{648}{54} = 12

So, length of one base is 12 ft  and another base =(5*12-19)ft =(60-19)ft = 41 ft

That means, the length of the longer base is 41 ft.



8 0
2 years ago
What is the value of the expression? 1/6 + 1/6
Tems11 [23]
To get the  answer to this question simply add he numerators but keep the denominator the same which will give you 2/6 then you simplify the answer by 2/2 to get the simplified answer 1/3
7 0
3 years ago
Read 2 more answers
Claire's suitcase weighs 15 pounds less than her older sisters.
Gnoma [55]

bro i read it wrong that's my bad hold on ill get the right one rq

3 0
3 years ago
(3j? - h) +3; use h=6, and j = 5​
Drupady [299]

Answer:

12

Step-by-step explanation:

(3j-h)+3

Plug in numbers:

(3(5)-(6))+3

Solve:

(15-6)+3

9+3=12

4 0
3 years ago
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