Solve. If necessary, round answers to the nearest hundredth.The following test scores were recorded for a student: 79, 74, 72, 68, 74, 60, 70. Find the mean, median, and mode.
A.
| mean: 72 | median: 68 | mode: 74 |
B.
| mean: 71 | median: 72 | mode: 74 |
C.
| mean: 71 | median: 68 | mode: 79 |
D.
| mean: 72 | median: 71 | mode: 79 |
Answer: B
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Find the unit tangent vector of the given curve.r(t) = (8 + 11t5)i + (6 + 2t5)j + (4 + 10t5)k
A. T(t) = 
i + 
j + 
k
B. T(t) = 
i + 
j + 
k
C. T(t) = 11i + 2j + 10k
D. T(t) = 
i + 
j + 
k
Determine if the following is a function or not. f(x) = 2 for x ? {2, 4} and f(x) = 4 for x ? {2, 4, 6, 8, . . .}
A. Yes B. No
Determine whether the graph representing the equation is symmetric with respect to the x-axis, the y-axis, the origin or none.x4 + y4 = 7
A. x-axis, y-axis, origin B. y-axis only C. origin only D. x-axis only
Solve the problem.A spinner has ten regions numbered 1 through 10. If the spinner is spun 100 times, we would expect about 10 of the outcomes to be Region 1. It can be determined that the spinner is unbalanced if x, the number of outcomes that result in Region 1, satisfies 
? 1.645. Describe the number of outcomes that determine an unbalanced spinner that is spun 100 times.
A. Fewer than 6 or more than 14 outcomes B. Between 9 and 17 outcomes C. Fewer than 9 or more than 17 outcomes D. Between 6 and 14 outcomes