Solve. Write each fraction in simplest form.The following graph is called a circle graph or pie chart. Each sector (shaped like a piece of pie) shows the number of each color of marbles that Luke has: 175 are red, 125 are blue, 70 are yellow, 90 are green, and 30 are clear. What fraction of the marbles are red? Write the fraction in simplest form. 
A. 
B. 
C. 
D. 
Answer: C
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Solve for x: x2 - 25 = 0
a. x = 5, -5 b. x = 25, 0 c. x = 12, 13 d. x = -12, -13 e. x = 0, -25
Find the axis of symmetry of the given function.y = -2x2 + 4x + 0
A. x = -2 B. x = 2 C. x = 1 D. x = -1
Determine whether the set of vectors is orthogonal.
, 
, 
A. No B. Yes
Solve the problem.Refer to the figure, where f(t) is the interest rate (as a percent) on a 6-month certificate of deposit t years after January 1, 1985. The straight lines are tangent to the graph of src="https://sciemce.com/media/4/ppg__vcvh0529192029__f1q61g5.jpg" alt="" style="vertical-align: 0.0px;" height="339" width="384" />
A. ? -2%/year
B. ? 0%/year
C. ? 2%/year
D. ? 1%/year
at 
and 
How fast was the interest rate changing on January 1, 1995?