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Sedbober [7]
2 years ago
13

Element X decays radioactively with a half life of 11 minutes. If there are 790 grams of Element X, how long, to the nearest ten

th of a minute, would it take the element to decay to 40 grams?
Mathematics
1 answer:
leva [86]2 years ago
3 0

Answer:

47.34158

rounded to the nearest tenth of a minute: 47.3

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A rotating lawn sprinkler sprays water in a circular area of grass as shown in the picture. The diameter of the circular area of
Georgia [21]

Answer:

9\pi \: \mathrm{ft^2\:or}\: 28.27 \mathrm{\: ft^2}

Step-by-step explanation:

The area of a circle is given by r^2\pi where r is the radius of the circle. The diameter is given as 6 feet, so the radius of this circle is \frac{6}{2}=3 feet.

Plugging in our values, we get:

3^2\pi=9\pi\approx28.27.

7 0
2 years ago
Is {(2,4)(3, 4). (4,4), (5, 6)} a relation?*
kirill115 [55]

Yes I hope it helps and sorry if it’s wrong
7 0
3 years ago
Which shows the most reasonable way to estimate 3 4/7 (-2 1/12) using compatible fractions
docker41 [41]

Answer:

B). 3 1/2(-2) = -7

Step-by-step explanation:

Let's evaluate the expression so as to be able to get the right estimate.

3 4/7 (-2 1/12)

=3 4/7 (-25/12)

= 25/7 * -25/12

= 25/7 * -25/12

= -625/84

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4 0
3 years ago
Solve this system of equations using substitution. Put your answer in ordered pair form, (x,y).
Gelneren [198K]
2x + 5y = 2
-3x - y =-3

-3x - y = -3
y = 3x - 3

substitute y = 3x - 3 into the first equation.

2x + 5y = 2
2x + 5(3x - 3) = 2
2x + 15x - 15 = 2
17x - 15 = 2

solve for x in 17x - 15 = 2

17x - 15 = 2
17x = 2 + 15
17x = 17
x = 1

substitute x = 1 into y = 3x - 3

y = 3x - 3
y = 3(1) - 3
y = 3 - 3
y = 0

(1, 0) << the answer

hope this helped, God bless!
8 0
3 years ago
There is a strong positive liner correlation between rainfall....
atroni [7]
I’m pretty sure that a is the answer
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3 years ago
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