Step-by-step explanation:
- We expand
using algebraic identity 
Answer:
Step-by-step explanation:
z=68
68+(13x+47)=180
68+13x+47=180
13x=65
x=5
Answer: -2/4 is smaller than -1/5
Step-by-step explanation: If you keep goin down on the negative scale then you will see that -1/5 comes before -2/4
Answer:
The probability is 0.97682
Step-by-step explanation:
We start by finding the z-values of the runner times given.
Mathematically;
z-score = (x-mean)/SD
From the question, mean = 13 seconds and SD = 0.3 seconds
So for 12.4 seconds, we have;
z = (12.4-13)/0.3 = -0.6/0.3 = -2
For 14 seconds, we have;
z = (14-13)/0.3= 1/0.3 = 3.33
So the probability we want to calculate is;
P(-2<z<3.33)
We can find this using the standard normal distribution table
Mathematically;
P(-2<z<3.33) = P(z<3.33) - P(z < -2)
Using the standard normal distribution table, the value of this is;
P(-2<z<3.33) = 0.97682
Answer:
1. C
2. A
3. B
Step-by-step explanation:
1. because 246 ÷ 300 = 0.82, so it is 0.82 but 82% in percentage
2. because 32 ÷ 96 = 0.333333, but in fraction, it is 33...%
3. because 173 ÷ 480 = 0.36041666666, but rounded up (to the nearest tenth) is 0.36, but then in percentage is 36%
Hope this helped! Pls Brainliest my answer! It would mean and help a lot! ; )
