Solve the problem.Ellen is knitting a scarf with one 7 -inch blue stripe, one 
green stripe, and one 
white stripe. How wide is the scarf?
A. 2
in.
B. 
in.
C. 11
in.
D. 
in.
Answer: C
Mathematics
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Determine whether the function is a solution of the wave equation.w(x, t) = cos (-6ct) sin (-6x)
A. Yes B. No
Mathematics
Determine whether the function is one-to-one.The function that pairs students' ID numbers with their GPAs.
A. Yes B. No
Mathematics
Write the equation in logarithmic form.63 = 216
A. log63 = 216 B. log2166 = 3 C. log6216 = 3 D. log3216 = 6
Mathematics
Solve the problem.In the following formula, y is the minimum number of hours of studying required to attain a test score of x: y = 
. How many hours of study are needed to score 83? Round to the nearest hundredth of an hour.
A. 4.51 hr B. 101.05 hr C. 1.75 hr D. 17.50 hr
Mathematics