Solve the problem.A 12-foot ladder is leaning against a house with the base of the ladder 3 feet from the house. How high up the house does the ladder reach? Round to the nearest tenth of a foot when appropriate. 
A. 10.9 ft
B. 11.6 ft
C. 12.4 ft
D. 9 ft
Answer: B
Mathematics
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Find the gradient field F of the function f.f(x, y, z) = 
3
A. F = 3
2i + 
j + 3
k
B. F = 
i + 
j - 3
k
C. F = 3
2i + 
j + 3
k
D. F = 3
2i + 
j - 3
k
Mathematics
Determine whether the given equation is an identity.5x + 8x = 12x
A. Yes B. No
Mathematics
Solve.In a biology class, six students took a test. Their scores are recorded in the following table. 
What was the average score on the test?
A. 65 B. 64 C. 69 D. 61
Mathematics
Find a polynomial function of lowest degree with rational coefficients that has the given numbers as some of its zeros.3 - 
, 1 + i
A. f(x) = x4 + 10x3 + 20x2 - 24x + 12 B. f(x) = x4 + 8x3 - 20x2 + 24x + 10 C. f(x) = x4 - 8x3 + 20x2 - 24x + 12 D. f(x) = x4 - 3x3 + 20x2 - 12x + 12
Mathematics