Questions by Rui Costa

Questions by Rui Costa

A team of psychologists is watching children's behavior at a local playground. They are not interacting with the children or asking them questions, they are simply watching and recording what the children

asked Jun 2, 2020

1 answer

1 vote

226k views

Andre sometimes mows on the weekend to make extra money. Two weeks ago, he mowed a neighbor’s lawn for 1/2 hour and earned $10. Last week, he mowed his uncles lawn for 3/2 hours and earned $30. This week,

asked May 2, 2020

1 answer

5 votes

6.1k views

How many milliliters of 2.0 M NaCl solution would you need to make 250 ml of 0.15 M solution

asked Mar 10, 2020

1 answer

1 vote

116k views

The rectangular prism with volume 120 cm3, width 5 cm, and height 3cm. what is the length

asked Jan 13, 2020

1 answer

1 vote

9.1k views

If an isotope of some element has a half-life of 300 years, about how much of the isotope atoms will be in a sample after 600 years? PLZ HELP

asked Oct 23, 2019

2 answers

5 votes

70.6k views

How do molecular genetics add to our understanding of genes?

asked Feb 5, 2019

1 answer

0 votes

64.0k views

How would you describe the graph of a system of equations if the solution to the system were all real numbers

asked Feb 2, 2019

1 answer

0 votes

130k views

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