Answer:
1. B
2. A
Step-by-step explanation:
1.
10^{-2} means that you move the decimal back two times
B is the only option that represents that correctly.
2.
5 * 10^{4} = 50000
2.5 * 10^{2} = 250
50000/250 = 200
Out of the options, A is the only option in which the equation also equals 200.
Answer:
C 40
Step-by-step explanation:
1 blue : 2 white
multiply both sides of the proportion by 20 to reach 20 blue marbles
20 blue: 40 white
A function is positive if it lies above the x axis.
This function is positive before x = -4, i.e. over the interval 
It is negative elsewhere, i.e. over the interval 
So, the only correct option is the second one.
Answer:
Angl.(QMT) = 134°
Angl.(QMT) = Angl.(QMS)+ Angl.(SMT)
or, 134°= (7x-4)° + (2x+3)°
or, 134° = 7x + 2x -4° +3°
or, 134° = 9x -1°
or, 134° + 1° = 9x
or, 135° = 9x
or, 135°/9° = x
or, 45° = x
x=45°
