Express the sum using summation notation.42 + 83 + 124 + ... + 329
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Solve the problem.A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 450 seconds and a standard deviation of 60 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 312 seconds.
A. 0.0107 B. 0.5107 C. 0.9893 D. 0.4893
Mathematics
Determine whether the statement is true or false.
?
If f is differentiable, then 
.
What will be an ideal response?
Mathematics
Evaluate the expression for the given values of x and y.
+ 
;
x = 4 and y = -1
A. 2 B. 1 C. 0 D. -1
Mathematics
Multiply.
A. x2 + 25x - 9
B. x2 - 25x - 9
C. x2 - 
D. x2 - 25
Mathematics