Find the angle between the given vectors, to the nearest tenth of a degree.w = -i + 4j, r = 3i - 5j
A. 1°
B. 57.9°
C. 73.1°
D. 163.1°
Answer: D
Mathematics
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Calculate the area of the surface S.S is the portion of the sphere x2 + y2 + z2 = 100 between z = - 5
and z = 5
A. 200?
B. 10
?
C. 200
?
D. 100
?
Mathematics
Use identities to find the exact value of the function for the given value.tan ? = 
and ? is in quadrant III; Find cot ?.
A. - 
B. 
C. 
D. 
Mathematics
Write the expression as the sum or difference of single logarithms. log9
A. 
log9x ? 
log9y ÷ 
log914
B. 
log9xy - 
log914
C. 
log9x + 
log9y - log914
D. 
log9x + 
log9y - 
log914
Mathematics
Simplify the exponential expression using the rules for exponents.
-2
A. 
B. 4c2
C. - 
D. 
Mathematics