Answer:
192
Step-by-step explanation:
to find the mean you have to use this formula: mean= N(total number of trials) times P( probability of "success")
n=640
p=0.3
640x0.3= 192
The sixth grade runs a bake sale for 55 hours and makes $170.
So in one hour, they made 170/55 = 3.09 dollars.
Rate: $3.09/h
The seventh grade sets up a dunking booth for 44 hours and makes $112.
So in one hour, they made 112/44 = 2.54 dollars.
Rate: $2.54/h
The eight grade has a car wash and makes $192 in 66 hours.
So in one hour, they made 192/66 = 2.90 dollars.
Rate $2.90/h
3.09 > 2.90 > 2.54
So R(6th) > R(8th) > R(7th)
Which means that the sixth grade has the highest rate for raising money.
Hope this helps! :)
Answer:
slope of 1/4
Step-by-step explanation:
slope formula= y2-y1/x2-x1
coordinates i chose: (0,60) (40,70)
70-60/40-0=10/40=1/4
therefore slope of 1/4
hope this helps, also what grade is this problem
Answer:
P= 160cm
Step-by-step explanation:
length= 60cm
width= 20cm
Answer:
B. 30cm³
Step-by-step explanation:
Volume of a prism=length×Breadth×Height(L×B×H)
Where Length(L)=5-cm, Breadth(B)= 2-cm Height(H)=3-cm
∴Volume=5×2×3=30 cm³