Solve the problem.Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students and B's to the next 23%. What is the bottom cutoff for a B grade? Round your answer to the nearest whole number.
A. 66
B. 76
C. 74
D. 71
Answer: C
Mathematics
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Write the vector v in the form v1i + v2j, given 
and the angle ? that v makes with the positive x-axis.
= 15, ? = 225°
A. - 
i - 
j
B. i - 
j
C. 
i j
D. - 
i + j
Mathematics
Use a calculator to find the function value to four decimal places.csc 1°53'22''
A. 30.3131 B. 1.0005 C. 2.0005 D. 30.3296
Mathematics
Perform the conversion. Round to the nearest tenth when necessary.3 ft to cm
A. 76.2 cm B. 91.4 cm C. 7.6 cm D. 118.1 cm
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Divide.
A. 4.07 B. 0.407 C. 14.07 D. 1.407
Mathematics