sarahc
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Questions Answered

sarahc:
Group Title
PRE CALC HELP
 updated 14 days ago
 5 replies
 1 Medal
Mathematics

sarahc:
Group Title
Find the standard form of the equation of the parabola with a focus at (7, 0) and a directrix at x = 7.
y = one divided by twenty eight…
 updated 15 days ago
 9 replies
 1 Medal
Mathematics

sarahc:
Group Title
Use mathematical induction to prove the statement is true for all positive integers n.
8 + 16 + 24 + ... + 8n = 4n(n + 1)
 updated 28 days ago
 17 replies
 2 Medals
Mathematics

sarahc:
Group Title
A certain species of tree grows an average of 4.2 cm per week. Write an equation for the sequence that represents the weekly height of this …
 updated 27 days ago
 3 replies
 2 Medals
Mathematics

sarahc:
Group Title
Let u = <6, 9>, v = <1, 4>. Find u  v.
<5, 5>
…
 updated 29 days ago
 2 replies
 1 Medal
Mathematics

sarahc:
Group Title
Find a ⋅ b.
a = 6i  6j, b = 4i + 2j
…
 updated 29 days ago
 9 replies
 1 Medal
Mathematics

sarahc:
Group Title
The given measurements may or may not determine a triangle. If not, then state that no triangle is formed. If a triangle is formed, then use…
 updated 29 days ago
 2 replies
 No Medals Yet
Mathematics

sarahc:
Group Title
Express the complex number in trigonometric form.
5i
…
 updated 29 days ago
 4 replies
 1 Medal
Mathematics

sarahc:
Group Title
Determine whether the vectors u and v are parallel, orthogonal, or neither.
u = <1, 2>, v = <4, 8>
 updated one month ago
 8 replies
 1 Medal
Mathematics

sarahc:
Group Title
Find a ⋅ b.
a = <2, 4>, b = <2, 5>
…
 updated 2 months ago
 2 replies
 No Medals Yet
Mathematics

sarahc:
Group Title
Evaluate the expression:
v ⋅ w
…
 updated 2 months ago
 3 replies
 1 Medal
Mathematics

sarahc:
Group Title
If there are 500 oak trees in a forest covering 50 square kilometers then the population density is
10 trees per square kilometer
100 tr…
 updated 7 months ago
 5 replies
 3 Medals
Mathematics

sarahc:
Group Title
In the oceans, global warming has ______.
decreased the amount of oxygen available
made the water more acidic
…
 updated 7 months ago
 5 replies
 1 Medal
Mathematics

sarahc:
Group Title
The first letter of important words in titles should be
capitalized
left as they appear in the publication
…
 updated 7 months ago
 16 replies
 1 Medal
Mathematics

sarahc:
Group Title
The fossil record suggests that whales
once had welldeveloped hind flippers.
are descended from one branch of marine reptiles.
…
 updated 8 months ago
 6 replies
 1 Medal
Mathematics

sarahc:
Group Title
Is this a stressor or a hassle? HELP
 updated 10 months ago
 5 replies
 1 Medal
Mathematics

sarahc:
Group Title
Is this a stressor or a hassle?
 updated 10 months ago
 4 replies
 3 Medals
Mathematics

sarahc:
Group Title
NEED SOME EXPERTS :) Once viruses are detected, the number of viruses increases rapidly. This is because ______.
lysogeny produces large n…
 updated 10 months ago
 3 replies
 1 Medal
Mathematics

sarahc:
Group Title
Which of the following describes a BrønstedLowry base?
a hydrogen ion acceptor
…
 updated 10 months ago
 3 replies
 No Medals Yet
Mathematics

sarahc:
Group Title
Water molecules move farther apart when water freezes, causing it to expand. Which of the following is a consequence of this property?
W…
 updated 10 months ago
 11 replies
 3 Medals
Mathematics

sarahc:
Group Title
When sulfuric acid is poured on sugar the volume expands, it turns black and gets very hot. Which of the following best describes this react…
 updated 10 months ago
 5 replies
 1 Medal
Mathematics

sarahc:
Group Title
Which of the following is not true regarding carbon?
Carbon 12 is radioactive.
…
 updated 10 months ago
 7 replies
 1 Medal
Mathematics

sarahc:
Group Title
Nucleic acids are polymers of ______ monomers.
fatty acid
DNA
…
 updated 10 months ago
 9 replies
 3 Medals
Mathematics

sarahc:
Group Title
Nucleic acids are polymers of ______ monomers.
fatty acid
DNA
…
 updated 10 months ago
 2 replies
 1 Medal
Mathematics

sarahc:
Group Title
CALLING ALL EXPERTS!
Some atoms become unstable because
…
 updated 11 months ago
 6 replies
 2 Medals
Mathematics

sarahc:
Group Title
What is the equation of a vertical line passing through (–4, –3)?
x = –4
…
 updated 11 months ago
 8 replies
 No Medals Yet
Mathematics

sarahc:
Group Title
What is the solution set of....
 updated 11 months ago
 10 replies
 1 Medal
Mathematics

sarahc:
Group Title
Simplify the expression
 updated 11 months ago
 5 replies
 1 Medal
Mathematics

sarahc:
Group Title
Solve 3 sqrt x2 + 7 = 28
x = –89
x = 9
…
 updated 11 months ago
 10 replies
 1 Medal
Mathematics

sarahc:
Group Title
Solve. 2x2 + 5x = 12.
x=3/2 and x = –4
x=2 and x=3
…
 updated 11 months ago
 4 replies
 1 Medal
Mathematics
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