Recent activity by David Ruan

Recent activity by David Ruan

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

1 answer 157k views

Solve |p + 2| = 10 {-8, 8} {-12} {-12, 8}

answered Jul 24, 2023

1 answer 57.5k views

Solve the equation -15=8z+7. z=

answered Jun 20, 2023

2 answers 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

1 answer 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

1 answer 60.5k views

Can someone help me？I'm I really need help. Please!

answered Apr 15, 2023

1 answer 50.9k views

How to become a film maker at age 17

asked Apr 13, 2023

2 answers 231k 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

1 answer 122 views

HELP ME AGAINN I'LL GIVE 17 POINTS -

answered Dec 25, 2022

2 answers 170k views

Please help me expand theses and then help me factorise these brackets

answered Dec 20, 2022

2 answers 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

2 answers 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

2 answers 134k views

What did the king do after his dressing was complete?

answered Nov 6, 2022

2 answers 95.0k views

Help me pls somebody?

answered Oct 17, 2022

1 answer 232k views

Winston earns $140.00 by selling 56 hotdogs at the school BBQ. If the cost of each hot dog stays the same, how many more hot dogs would Winston need to sell to earn a total of $175.00

asked Oct 3, 2022

1 answer 127k views

How do animal behaviors affect the probability of reproductive success?

answered Sep 11, 2022

2 answers 46.2k views

Te retamos a resolver en tu cuaderno los siguientes ejercicios y preguntas. 1.Nuestro país tiene el número más grande de especies por unidad de área en el planeta. La fauna es muy variada especialmente

asked Sep 4, 2022

1 answer 69.8k views

Why do we get hyper on sugar?

asked Jun 3, 2022

1 answer 3.9k views

Determine the quotient 2 4/7 divided by 1 3/6

asked May 11, 2022

1 answer 218k views

In a multiprogramming and time-sharing environment, several users share the system simultaneously. This situation can result in various security problems. a) What are two such problems? 1. One user can

asked Mar 19, 2022

1 answer 19.3k views

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