Kayla began a science experiment with 18 grams of an unknown solid. During the experiment, the change in the mass of the solid was – 7 grams. What was the mass of the solid at the end of the experiment? To solve the problem, Edna subtracted 18 – ( – 7 ) and came up with an answer of 25 grams. Is Edna correct? Why or why not? Yes, Edna is correct. No. The answer should have been – 25 grams, not 25 grams, because the mass of the solid decreased. No. Edna should have added 18 + ( – 7 ) because she needed to add the initial mass and the change in mass.
Kayla began a science experiment with 18 grams of an unknown solid. During the experiment, the change in the mass of the solid was – 7 grams. What was the mass of the solid at the end of the experiment? To solve the problem, Edna subtracted 18 – ( – 7 ) and came up with an answer of 25 grams. Is Edna correct? Why or why not? Yes, Edna is correct. No. The answer should have been – 25 grams, not 25 grams, because the mass of the solid decreased. No. Edna should have added 18 + ( – 7 ) because she needed to add the initial mass and the change in mass.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
Related questions
Question
Kayla began a science experiment with 18 grams of an unknown solid. During the experiment, the change in the mass of the solid was
7
grams. What was the mass of the solid at the end of the experiment?
–
To solve the problem, Edna subtracted
7
and came up with an answer of 25 grams. Is Edna correct? Why or why not?
18
–
(
–
)
Yes, Edna is correct.
No. The answer should have been
25
grams, not 25 grams, because the mass of the solid decreased.
–
No. Edna should have added
7
because she needed to add the initial mass and the change in mass.
18
+
(
–
)
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