150 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 65 and standard deviation ? = 10.Approximately what percentage of the test scores had standardized values between -2 and 2?
A. 95%
B. 68%
C. 99%
D. 50%
E. none of these
Answer: A
Mathematics
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Translate the English statement into an inequality.The rocket must reach a speed of at least 949 mph. (Use the variable V for speed.)
A. V ? 949 B. V < 949 C. V > 949 D. V ? 949
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Simplify the expression using the order of operations. (-4.4 - 2.5)2
A. 25.61 B. -25.61 C. 47.61 D. -47.61
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Solve the problem.An initial investment of $1740 is appreciated for 14 years in an account that earns 7% interest, compounded continuously. Find the amount of money in the account at the end of the period. Round to the nearest cent.
A. $12,856.96 B. $2868.78 C. $6,127,559.21 D. $4636.15
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Write the inequality in interval notation.-3 < x < 1
A. [-3, 1] B. (-3, 1] C. [-3, 1) D. (-3, 1)
Mathematics