Answer:
The value za/2 needed to constrict a confident interval with level 87% is 1.51
Step-by-step explanation:
At 87% confidence level the z is ,
α= 1 - 87%
= 1 - 0.87
= 0.13
α/ 2 = 0.13 / 2
= 0.065
Zα/2 = Z0.065
= 1.51 ( Using z table )
The value of the smaller number is 5.
Small number= S
Big number= B
B-S=25
6B-S=25
(S-6B)6=25
150-6B=S
5S=150
B=30
S=5
30-5=25
Look at it this way 1(700)*1(20). can u do it now?
Ok so u were close but the answer is actually C and here's why:
The vertex of the parabola is ( -4 , -6 ) And you can tell this since the equation is in vertex form y = a(x - h)^2 + k
Remember axis of symmetry cuts the parabola down the middle meaning it goes through the x axis. x = -4
Picture for support: