Find the flux of the curl of field F through the shell S.F = -5zi - 3xj - 3yk ; S: r(r, ?) = r cos ?i + r sin ?j + 5rk, 0 ? r ? 5 and 0 ? ? ? 2?
A. -75?
B. 75?
C. 0
D. -75
Answer: B
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Use problem solving strategies to solve the problem.There is a number between 2 and 8, such that if you raise any of the remaining numbers to the power of this number, the units digit of the result will always be equal to the base. What is the number?
A. 7 B. 3 C. 5 D. 2
Simplify the expression.20 + 19 ? 22
A. 438 B. 61 C. 858 D. 402
In a certain city there is a river running through the middle of the city. There are three islands and seven bridges as shown in the figure below.
It is possible to take a walk through this town, starting on the North Bank, crossing each bridge once (and only once) and ending
A. on the South Bank. B. back on the North Bank. C. on island B. D. on island C. E. none of these
Express as the logarithm of a single expression. Assume that variables represent positive numbers.logbx + logby
A. log2b(x + y) B. logbxy C. logb(x + y) D. log2bxy