250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 75 and standard deviation ? = 10.Approximately how many students had test scores with standardized values between -0.675 and 1?
A. 107
B. 188
C. 147
D. 85
E. none of these
Answer: C
Mathematics
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Solve the problem by integration.The general expression for the slope of a curve is 
If the curve passes through the point 
find the equation for the curve.
A. y = ln 
+ 3
B. y = -ln 
- 2
C. y = ln 
+ 2
D. y = ln 
+ 2
Mathematics
Use the given information to find the exact value of the trigonometric function.cos ? = - 
; sin ? > 0
Find cos 
.
A. 
B. - 
C. - 
D. 
Mathematics
Solve the inequality. Write the solution set in interval notation and graph it.-2 ? 5 + 
q ? 9
A. [-7, 4]
B. (-7, 4)
C. (-14, 8)
D. [-14, 8]
Mathematics
Add.684.45 + 7.02
A. 691.36 B. 691.46 C. 691.47 D. 691.37
Mathematics