An open box of maximum volume is to be made from a square piece of material 20 centimeters on a side by cutting equal squares from the corners and turning up the sides (see figure). Write the volume V as a function of x, the length of the corner squares.
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Answer: A
Mathematics
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Evaluate the integral.
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Mathematics
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
Identify the leading term and leading coefficient of the polynomial.-x - 4x2 - 3x3 - 4x5 + 5
A. -x, -1 B. 4x5, 4 C. -4x5, -4 D. -3x3, -3
Mathematics
Use the order of operations to simplify the expression.[36 - (4 + 6) ÷ 2] - [1 + 12 ÷ 3]
A. 23 B. 21 C. 33 D. 26
Mathematics