Answer:
Step-by-step explanation:
An negative exponent seems hard, but it really isn't!
Let's say you have
All you do is inverse the expression, or find the reciprocal. When you do this the exponent changes to positive .
simplifies into 8. So, the result is
Hope this helps! Please mark as brainliest, thanks!
Answer:
The probability that a randomly selected chocolate bar will have a. Between 200 and 220 calories will be 0.3023
Step-by-step explanation:
Given:
True mean=225
S.D=10
X1=200 and X2=220
To Find:
P(X1<x<X2)
Solution:
<em>BY using Z-table for probability and Z-score we can proceed.</em>
So
For 200 calories Z will be ,
Z=(sample mean -true mean)/S.D
=200-225/10
=-25/10
=-2.5
For 220 calories Z will be ,
Z=220-225/10
=-5/10
=-0.5
So required probability will be
=0.3023
Answer:
Step-by-step explanation:
We want to simplify:
To simplify this, we need to write the negative index as positive.
So we use the property,
When we apply this property, we get:
Therefore the fourth option is correct.