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2 years ago

14

How much of a radioactive kind of francium will be left after 10 minutes if the half-life is 5 minutes and you start with 96 gra

ms?

1 answer:

trapecia [35]2 years ago

6 0

Answer:

24

Step-by-step explanation:

96/2=48/2=24

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4/15x equals 2/5<br> solve for x

irina [24]

Answer:

$1\frac{1}{2} = x$

Step-by-step explanation:

$\frac{\frac{2}{5}}{\frac{4}{15}} = \frac{2}{5} \times \frac{15}{4} = \frac{30}{20} = 1\frac{1}{2}$

I am joyous to assist you anytime.

7 0

3 years ago

Someone plz help me :(

saul85 [17]

the answer is A

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4 0

2 years ago

Read 2 more answers

Solve the equation for the specified variable.<br> T= BA-9, for B<br> What does b=

NARA [144]

9514 1404 393

Answer:

$B=\dfrac{T+9}{A}$

Step-by-step explanation:

Add 9 to both sides of the equation, and divide by the coefficient of B.

T = BA -9

T +9 = BA

(T +9)/A = B

We can rewrite that with B on the left:

B = (T +9)/A

4 0

3 years ago

The mean of six numbers is 8, and the mean of another four numbers is 5.

Ket [755]

Answer:

6.8

Step-by-step explanation:

8 * 6 = 48 (to reverse dividing by 6 to basically un-average the 6 numbers).

5 * 4 = 20 (to un-average these numbers as well).

48 + 20 = 68

68 / 10 = 6.8

Basically by doing this you are still adding all the numbers together & then dividing by 10 as if you added them all up at once & not in a group of 6 & a group of 4.

Hope this helped. :)

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2 years ago

All identities are equations, and all equations are identities.<br> A. True<br> B. False

Lorico [155]

this is false not all equations and all equations are identities are same

6 0

2 years ago