Answer:
Step-by-step explanation:
The total length of the belt is:
Convert 5/2 to a mixed number first:
Divide 5 by 2; 2 will go into five 2 times with a remainder of 1. This means the whole number portion of the mixed number is 2, and the remainder of the fraction is 1; this gives us 2 1/2.
To plot 2 1/2, plot a point halfway between 2 and 3.
Let the score on her seventh test be "x".
SO,
∴ He must get 104% on his seventh test to get an average score of 90%
20+2x/5-x
Start by writing it as a fraction
20 + 2/5x (fraction) - x
Next you calculate the difference
20 - 3/5x (fraction) is the answer
Answer:
19.92
Step-by-step explanation:
To overfill 5% of the time ;
The Zscore (value) to the left of (1 - 0.05) = 0.95 is 1.645
Using this Zscore value with the Zscore formula :
Zscore = (x - μ) / σ
σ = 0.05 ; x = 20 ounce
Substituting into the Zscore formula :
1.645 = (20 - μ) / 0.05
1.645*0.05 = 20 - μ
0.08225 = 20 - μ
μ = 20 - 0.08225
μ = 19.91775
μ = 19.92
