Answer:
a = 
Step-by-step explanation:
Given
ai + bj and 5i - 2j are perpendicular and b = 3, that is
ai + 3j and 5i - 2j are perpendicular, then
The scalar product = 0 , that is
5a - 6 = 0 ( add 6 to both sides )
5a = 6 ( divide both sides by 5 )
a = 
Answer:
c. 122.1 cm
Step-by-step explanation:
so l * w + 
since 6 cm is the diameter
6/2 = 3
the radius (or r) is 3
so 18 * 6 + 
108 + 
108 + 
108 + 14.13 = 122.13
simplified: 122.1 cm
hope this helps:)
The answer is C; 35.5 units^2
Answer: 
Step-by-step explanation:
The reciprocal would be 9/7 because a reciprocal is when you flip a fraction and put the denominator as the numerator and vice versa.