Answers by David Ruan
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Answers by David Ruan

Answers by David Ruan
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Potassium-42 has a half-life of 12.4 hours. How much of a 746-gram sample will be left after 62 hours?
answered Oct 1, 2023
0 votes
157k views
Solve |p + 2| = 10 {-8, 8} {-12} {-12, 8}
answered Jul 24, 2023
5 votes
57.5k views
Solve the equation -15=8z+7. z=
answered Jun 20, 2023
10 votes
165k views
The function f(x) is graphed below. What is true about the graph on the intervalfrom point c to point d?baeSubmit AnsweroIt is positive and increasingaIt is positive and decreasingIt is negative and increasingIt
answered May 15, 2023
6 votes
191k views
What is the average rate of change for this quadratic function for the intervalfrom x= -5 to x= -3?10-1810-10A. 80B. -8C. 16D.-16
answered May 12, 2023
5 votes
60.5k views
Can someone help me？I'm I really need help. Please!​
answered Apr 15, 2023
9 votes
51.0k views
Triangle ABC is congruent to triangle A′′B′′C′′ . Which sequence of transformations could have been used to transform triangle ABC to produce ​ triangle A′′B′′C′′ ​ ? ​ Triangle ABC ​ was reflected across
answered Jan 20, 2023
7 votes
124 views
HELP ME AGAINN I'LL GIVE 17 POINTS -
answered Dec 25, 2022
5 votes
170k views
Please help me expand theses and then help me factorise these brackets
answered Dec 20, 2022
5 votes
68.7k views
The sum of the lengths of is 15.12 cm. The length of is 6 cm and the length of is 4.3 cm. What is the length of ? A. 25.42 cm B. 4.92 cm C. 4.82 cm D. 4.72 cm
answered Dec 8, 2022
6 votes
141k views
The map shows the location of four places in a city. Eric's house is in the same quadrant as the library. Which of the following could be the coordinates of Eric's house? (2,4) (-2,4) (2,-4) (-2,-4)
answered Nov 26, 2022
5 votes
134k views
What did the king do after his dressing was complete?
answered Nov 6, 2022
2 votes
95.0k views
Help me pls somebody?
answered Oct 17, 2022
7 votes
232k views
How do animal behaviors affect the probability of reproductive success?
answered Sep 11, 2022
5 votes
46.2k views
Simplify 4/(√5+ √2) - 3/(√5- √2)​
answered Mar 11, 2022
7 votes
14.5k views
What is “judicial review”? Which Supreme Court establishes this power?
answered Jan 19, 2022
4 votes
210k views
A raido station uses 1/6 of its time for news. In a 12 hour day, how many hours are used for news​
answered Dec 26, 2021
5 votes
132k views
1-10 rate 14+35=? help please
answered Dec 23, 2021
5 votes
207k views
Why is it important to the United States to have a successful transition of power to a new president?
answered Dec 10, 2021
2 votes
120k views
What effect did jfk inaugural speech have?
answered Dec 9, 2021
6 votes
187k views
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