Answer:
1. 1/3
2. 1/6
Step-by-step explanation:
1. 1/3 chance of getting a 3 or 4
2.
2 red
3 blue
4 green
The chance of Niki getting green on her first try is 4/9
The chance of Tom getting blue after Niki picks, is 3/8
4/9*3/8= 12/72
12/72=1/6
Answer:
62
Step-by-step explanation:
Answer:
37.7
Step-by-step explanation:
2πr = circumference
r=d/2
r=12/2
r=6
2*π*6 = 37.68
For every x value, there should be only one y value. Or, for every input there is only one output.
A - Incorrect - there are two 2's for the x values and each of them has a different y value
B - Correct - all of the x values are different and all of the y values are different
C - Incorrect - there are two 11's for the x values and each of them has a different y value
D - Incorrect - there are two 3's for the x values and each of them has a different y value
Hope this helps! :)
Answer:
1/sqrt10
Step-by-step explanation:
1) Find out cosA using formula (cosA)^2+(sinA)^2=1
The module of cosA= sqrt (1- (-3/5)^2)= sqrt 16/25=4/5
So cosA=-4/5 or cosA=4/5.
Due to the condition 270degrees< A<360 degrees, 0<cosA<1 that's why cosA=4/5.
2) Find sinA/2 using a formula cosA= 1-2sinA/2*sinA/2 where cosA=4/5.
(sinA/2)^2= 0.1
sinA= sqrt 0.1= 1/ sqrt10 or sinA= - sqrt 0.1= -1/sqrt10
But 270°< A< 360°, then 270/2°<A/2<360/2°
135°<A/2<180°, so sinA/2 must be positive and the only correct answer is
sin A/2= 1/sqrt10
