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AlladinOne [14]

3 years ago

13

A Radioactive material has a half-life of 18.4 days. After 55.2 days, there were 177 mg of the material. What mass of the materi

al was originally present?

1 answer:

saveliy_v [14]3 years ago

8 0

1416 mg or 1.416 g ...................

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7th grade math answer ASAP. answer all 6 questions and if you get all of them right i will give brainliest and thx and 5 star.

Hitman42 [59]

Question 1: 5/8=0.625=62.5% 13/22=about 0.59(repeats 09)=9%
22/30=about 0.73(repeats 3)=73% 12/25=0.45=45%
Store 3 had the greatest percentage of smart phones.
Question 2: 0.775/7.75%=0.775/0.0775=10
For mobile phone 3, it uses o.775 hour of battery life if 7.75% of battery is used.

6 0

3 years ago

Given: -2x < 10. Choose the solution set.

nadya68 [22]

Answer:

C

Step-by-step explanation:

given - 2x < 10 ( divide both sides by - 2 )

Remembering that the symbol is reversed when multiplying/ dividing by a negative quantity.

x > - 5 ← note reversal of symbol

solution is {x | x > - 5 } → C

4 0

3 years ago

Enter fifty-two million, six hundred thirty-seven thousand, nine hundred fifteen.<br> In number form

expeople1 [14]

Answer:

52,637,915

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Warren has a container which holds 22 books of the same shape and size. The exact breakdown of his books is shown below:

ohaa [14]

Given:

Total number of book = 22

Number of white books = 6

Number of Purple books = 9

Number of green books = 7

To find:

The probability that Warren takes out a green book in both draws (with replacement).

Solution:

We know that,

$\text{Probability}=\dfrac{\text{Favorable outcomes}}{\text{Total outcomes}}$

$P(\text{White})=\dfrac{6}{22}$

$P(\text{Purple})=\dfrac{9}{22}$

$P(\text{green})=\dfrac{7}{22}$

After replacement, the probability of event remains the same and the independent.

The probability that Warren takes out a green book in both draws is:

$P=P(\text{green})\times P(\text{green})$

$P=\dfrac{7}{22}\times \dfrac{7}{22}$

$P=\dfrac{49}{484}$

Therefore, the correct option is (a).

7 0

3 years ago

Your friend borrows $7500 to buy an all-terrain vehicle (ATV). The simple annual interest rate is 6%. She pays off the loan afte

e-lub [12.9K]

Answer:

$162.50

Explanation:

The total amount to be paid is 7500+5(7500)(0.06)=$9750.

There were a total of (5)(12)=60 payments, so each payment is 9750/60 = $162.50.

6 0

2 years ago